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Blake lost track of time... all he could think about was his own happiness at having everything that he wanted. He felt strong and powerful, and beautiful too. He was just as impressive as the black stallion he was before, only now he was on two legs instead of four and could use his human voice. "This is perfect!" the teenager thought to himself, while squeezing his little colt brother up against himself and feeling a rush of exuberance as the outrageously fat and long girth of his shire cock flexed and wriggled between the front of his body and the back of Basil's. "Ohh... yes... you're mine too..." Blake thought to himself, trembling with excitement as the bare black flesh of his heavy equine penis rubbed through the milky soft fuzz coating his little brother's big horse-like butt and his back and shoulders. The fat spongy flaretip jerked up against one of Basil's fuzzy colt ears, drooling a few big dollops of precum along the full length of the softly flicking ear. Blake let out an uncontrollable whickering sound, squeezing his colt again possessively as he rolled his hips and dragged his trembling fleshy pole up and down over the younger boy's backside, watching eagerly as his musky goo marked the boy's pristine white fuzz and stuck between his cocktip and his colt's ear. Blake panted a little, his loins heating up with a level of quickness and fiery intensity that the boy hadn't felt before. He could feel all of his senses prickling and his huge floppy black cock felt so pleasureful that he only wished he could touch and stroke every inch of it at once. Blake brushed his velvety nostrils over his little brother's ear, taking in both of their scents... his brother's scent was still kind of sweet and creamy, somehow reminding him of a cow, even though he <knew> that wasn't right.

Now Blake could see that his brother had been asleep. The younger boy was blushing strongly on his cheeks and had a cute, pleasured look to his still human face. He seemed to have adapted over time to the steady buzzing occurring within his own heavy horse-cock, as well as the stretching of the boy's bloated urethra from those over-sized beads. Blake gazed down over the front of his little brother's white-fuzzed coltish form and grinned as he saw the boy's beautiful black shire length bulging lewdly with the big beads, almost constantly flexing over them as if it were attempting to swallow a few more. Beneath that, Basil's overplumped white-fuzzed spheres were twitching with eagerness, like a pair of big milky reserves ready to unleash a torrent of cream at any moment. Blake shook his head again, blushing... Basil's not a cow, he thought again, though gazing over the boy's enormous orbs and long floppy length did make Blake feel helplessly thirsty.

Without much more thought, Blake pulled back and rolled the sleeping boy towards himself, then gently gripped around Basil's slightly soft member about midway down, holding it steady while his other hoof-hand grabbed the end of the big bead toy which was hanging out of his bulging flare. Very slowly, he started pulling the beads free. With each buzzing bead that plopped out of the fattened cum-nozzle, Basil made an adorable little "Ohhh" while his shaft flexed powerfully in Blake's grasp. A few times the outward plop of a bead would come with a sticky, gooey splash of the boy's pre-cum which would spatter his own cheeks and his pillow. By the time Blake got to that last bead, he was tugging painstakingly slowly, trying to keep his little brother from having that enormous orgasm which he could tell had been building and bubbling up for the last few hours. Finally, the last bead PLOPPED free with another goopy shower of pre-cum coming forth, sticking a bunch of the stuff between Basil's wobbly tip and the headboard behind the boy's pillow. "That's good..." Blake said with a silly smile to him, tossing the pre-cum slathered beads on the bedding to the side and watching as Basil gradually opened his eyes, still flushing and then making another soft "ohh" sound as he became more aware of the effects of the rather intense teasing. Basil's broad length was still quite bloated looking even with the beads gone, and the urethra opening was gaping huge while more pre-cum slopped up over the sides of the boy's throbbing flare. Blake practically drooled looking at how well his brother's shire cock was trained from the dildo and beads, the boy wondering what else he might be able to stuff in there. Basil panted cutely while gazing up to him, and Blake hefted the fat shaft up close to his black-fuzzed muzzle, opening wide and slowly easing the glistening flare in, squishing the fat slippery flesh with his maw. Blake watched the building ecstasy in his little brother's expression while he gently smacked his throbbing flare back and forth in his muzzle, trying the gaping urethra with his tongue which he slopped in about as far as he could. Basil didn't seem phased by it this time, the boy just blushing more along his fuzzy colt ears while his adorable look of pleasure practically begged for more. Blake reached down one hoof-hand, cupping his digits underneath Basil's huge soft-fuzzed balls and hefting them a little while he started plunging his tongue up and down inside the boy's cum-nozzle. Basil's blissful expression grew more excited and the boy gasped again, moaning... nodding... more... he wanted more. Blake's arousal jerked up wildly... he felt his body trembling, his senses pulsing in tune with his brother's excitement. It was almost the same feeling the boy felt earlier just as he was regaining his stallion features, only more pleasureful. He could hardly resist it, feeling himself growing a little larger in the process, his hooves getting bigger as well as his other stallion parts. Just then, Blake heard the sound of the front door opening and closing, and what sounded like his aunt and uncle talking. He pulled his muzzle off his brother's bloated tip with a very wet, sloppy smack sound and panted, his vision hazy... Basil was looking even closer to the edge of climax than before.

"Ahh... they're back..." Blake said finally as his thoughts cleared up, reluctantly laying Basil's thrumming cock back down over the boy's chest while he sat up on the bed and a wave of apprehension overcame him. He hadn't thought at all about what he would say to them. He blushed a bit, thoughts racing through his head for a moment before he looked back to his little brother and said, "Hey... put your pajamas on before aunty comes up." Blake wasn't sure if he was just trying to keep Basil modest in front of them, or if it was just his stallion possessiveness urging him to keep his brother all to himself. He also briefly considered his own modesty, but it didn't take Blake long to realize that he was not going to be close to fitting in any of his clothes. He could tell he was a lot bigger now, probably over six and a half feet. About all the young stallion could do at this point was relax his massive arousal, and he closed his eyes for a few moments, facing away from Basil and trying not to focus on the colt's addictive scent. He could hear the other boy rustling the covers a bit as he slipped off the bed, then walked over to get his stretchy pajamas. There was also the soft sound of the boy's still floppy member slapping a bit as he walked. After a little longer, Blake opened his eyes back up and glanced tentatively in his brother's direction. Basil smiled to him and swished his golden colored tail, the boy's coltish form practically bursting out of the tightly stretched night garment. Fortunately, the soft cottony blue/black patterned outfit was very, very stretchy... particularly the pajama bottoms, which couldn't adequately cover the boy's very plump white draft-horse butt or do anything to hide the ponderous bulges in front. Almost the full outline of the boy's shire penis was visible running down one leg and the swells of the boy's big nuts were also pressing at the tautly pulled fabric. Blake blushed again, nodding appreciatively to his brother and then looking away again before his very active imagination got to work once more.

Blake's arousal gradually relaxed, though he was only halfway back into his sheath by the time he heard his aunt coming up the stairs. Aunt Jenny knocked at the door and said, "We're back from the store. Are you decent?" Blake smiled sheepishly and looked back at Basil again, then looked down at himself... He took a few deep breaths, then nodded...

"S...sure aunty, come in," he said while swishing his tail side to side across his black-fuzzed flanks.

The door opened slowly, and Aunt Jenny stepped into the boy's bedroom, carrying an empty laundry basket in front of her with both arms, "Ah, I'm glad you're back Blake! I'm about to do some laundry, so why don't you boys gather up your dirty clothes and..." She stopped in her tracks when she set her gaze on the strange black-furred creature in front of her. A range of reactions raced through her mind at that moment, surprise, fear, and disbelief were chief among them. "B....B...Blake?" she stammered and started backing away from the stallion boy. In addition to his equine form, the creature before her was also more than a foot taller than Blake was, making him somewhat intimidating. Aunt Jenny stared at Blake and trembled, confused and frightened. She wanted to scream but nothing came out at first, as her astonishment took her breath away.

Blake became very flustered and searched for the right words. "Don't worry aunty... it's me Blake, and Basil's here too... we're okay... we're actually... better now!" he said reassuringly.

"Sam!!" Aunt Jenny called out to her husband downstairs, taking another step away from Blake while she held the laundry basket in his direction, as if she planned to use it as a shield against the boy. Her attention was so focused on Blake, she didn't even see Basil approaching her quietly from the side. She nearly jumped out of her shoes when she felt the younger boy tugging at the hem of her shirt, looking up to her with his usual friendly smile and blushing, his lustrous tail swishing lazily over his pajama covered horse butt. Aunt Jenny gasped as she looked down at this other boy... he looked kind of like Basil, but... he also looked like some kind of white furred, two legged horse creature just like the black-furred one in front of her. "B...asil...? Is... is that... you? Ohh... God..." Aunt Jenny started to waver, dropping the laundry basket as her legs went weak, her vision went all black and she passed out. Luckily, Blake was quick enough to catch her in his strong arms before she fell to the floor.

"Ugh, I thought she might understand..." Blake said as he held Aunt Jenny underneath her arms, keeping her elevated. Basil walked over, looking over her apprehensively. "Don't worry, she's just... asleep." Blake said to his brother, who bobbed his head a few times and started swishing his tail again, relieved. Blake carried Aunt Jenny over to his bed and laid her on her back, at which point he realized that the 'toy' was still out in the open. He blushed a little and tried holding back his horny teenaged thoughts, looking back over to his brother and gesturing to the beads, "Hey... take those back into the bathroom, okay Basil?" By now, the younger boy's horse parts seemed to have shrunken back down to a more manageable size, though Blake could still make out the snake-like outline of the boy's cock swaying inside his pajamas as he walked over to pick up the big beads. Blake smiled and patted his little brother on the head, "Good colt," he said and smiled again, watching Basil blush and then head to the bathroom, the boy's lush equine rump flexing with each step as he went to hide the toy along with the dildo. By then, Blake could hear Uncle Sam coming up the steps.

"Jenny? What's wrong? Don't tell me the boys broke something while we were out..." he said half jokingly.

"Uncle Sam, Auntie passed out... she... uh... don't be mad but... something happened to us..." Blake stammered as his uncle stepped into the doorway and looked into the room. He looked right at Blake, his mouth agape as if he was about to speak but was caught off guard by what he was seeing. "What..." he started, then shook his head, as if he were trying to wake up from some kind of bad dream.

Blake continued, his voice still wavering a bit "We... we took some of the pills... they... changed us," he said, while Uncle Sam continued to stare at his large black equine form, struggling to make sense of it all. He blinked a few times, then turned his gaze on his wife laying on the bed. "What happened..." he gruffed, approaching the bed with one eye still watching the horse-creature calling itself Blake.

"She passed out when she saw us... don't be mad. It was an accident! She's ok though." Blake stepped away from Aunt Jenny for a moment to give his uncle some space.

After confirming that his wife was simply sleeping, Uncle Sam turned back towards Blake and softened his hard gaze a little, seeing how worried the strange horse-boy looked. Maybe it really was Blake, he thought. "Where's Basil?" he asked, looking around to one side of the room and then the other. When he looked back over Blake, he seemed to realize for the first time that the black-furred boy was totally naked and had several inches of fat black horse-penis hanging out of his sheath. "And... where are your clothes? Put... something on..." he said, shuddering a little as he held Aunt Jenny's hand and squeezed it for a second.

Blake surprised himself by blushing, suddenly being reminded about his human modesty after his uncle's admonition. "They don't fit anymore... Uhhh... hmmm," Blake nervously clopped over to the closet, grabbing a white sheet which he promptly wrapped around his waist just to cover up as quickly as possible.

"Where's Basil?" Uncle Sam repeated, relaxing his guard slightly more now that Blake had covered himself up.

"He's here... just behind you," Blake said while gesturing in the direction of the bathroom.

Uncle Sam turned to see Basil walking towards him. The younger boy was only a little more recognizable than Blake, since his head was still human looking except for the big white equine ears. Everything else on Basil looked similarly equine though, and like Blake the younger boy's hips, butt and thighs were noticeably larger. Uncle Sam blinked a little bit as he also saw how Basil's tummy was unusually swollen, but he became a little distracted seeing the fat, tube-like outline of the boy's equinehood wobbling around under his tight lower garment. Uncle Sam blinked again and shook his head once more in disbelief, though when Basil stood in front of him blushing and looking to him nervously, he reached over the boy's head and patted him a few times reassuringly. He stood there, quietly looking between the two boys for a moment and letting it all sink in. Then, their uncle finally spoke up "I'll talk with Dr. Greenly tomorrow... He made those pills. He must know how to reverse this..."

"No!" Blake replied, whimpering a little. "We're ok... like this! We don't have to go back! Look, I'm bigger and... and stronger and I feel perfect!" Blake puffed up his chest impressively, trying to show his uncle how much better he was in this form.

"You're sick! The pills are affecting you... they weren't meant for humans, they're for horses!" Uncle Sam replied firmly, shaking his head at Blake and then glaring at the boy. "And what about your little brother?"

"Basil's... he's almost perfect too! He's beau... I mean, he's just as healthy as me! Besides, that scientist scares me... He was looking at me strangely when he said he was coming back..."

Uncle Sam stopped for a moment, thinking hard. Blake wasn't around when Dr. Greenly said he was coming back. Only he and Dr. Greenly's son were there... and Fascinus... and the big black... He quickly put two and two together, gasping softly. "That large black shire who suddenly appeared... That was you, wasn't it Blake?"

Blake wasn't sure how to answer. He looked down quietly and just froze up a bit.

"It was you... god... I had no idea... those pills are dangerous! How did you change back? I mean... what if that happens again? You could hurt someone!" Uncle Sam shook his head, scooping Aunt Jenny up in his arms as he turned away from Blake and started towards the door. "I'm calling Dr. Greenly first thing in the morning. I'll get him to turn you boys back." He nodded to himself, looking down at Basil again while the boy stood there playing his hands over his tummy. "Don't worry, we'll fix this. Just get some sleep." Uncle Sam lingered just a little longer, and then he carried Jenny out and headed back to his own room to put her in bed.

After their uncle left, Blake whimpered again and scuffed his hooves a bit over the carpet as he became a little antsy. The boy didn't want to change back. He was perfect just the way he was. He also didn't care if he transformed into the four legged shire. In fact, that was the most exhilarating experience he had ever known. "I won't let anyone change us back..." he said, growling a little to himself while looking over at his little brother. Basil had already walked back over to his bed and was sitting at the edge of it, looking up to his big brother and smiling while holding his big horse plush in his own lap and squeezing it a bit. Blake's thoughts drifted towards those more possessive and carnal in nature as he locked his gaze onto his 'colt' again, swishing his tail in a slightly agitated manner. He wouldn't let them take this away... Blake tossed his mane, flaring his nostrils and breathing up some more of Basil's enticing scent, "Come here Basil. We're going... uhh... home," he said while smiling as best as he could and holding out his hoof-hand to the younger boy.

At first, Basil seemed a little unsure about this and hesitated, blushing and looking down a little while squeezing his plush tighter. His uncle had said that they should go to sleep. He said he was calling that strange scientist and he would change them back to normal. He didn't want to get in trouble. Then his big brother looked at him a little more firmly and said, "Come to me Basil. Let's go." This time, Basil felt some strange instinct compelling him to follow the older boy's direction. He slid off the bed and back onto his feet, then plodded over to his big brother and took his outstretched hoof-hand, while holding his horse plush in his other arm and blushing a bit.

"Good," Blake said and smiled again, before leading his little brother out of their room and down the stairs as quietly as he could. As he stood at the base of the stairs holding Basil's hand, Blake considered where exactly the two might go. Maybe he could 'borrow' his uncle's truck and they could make it downtown. If they could get on the news or something, maybe they'd become big celebrities. "Yea... that's it. Then we'll be properly appreciated," the boy said while smiling and swishing his tail again happily. Basil looked up at him curiously, wondering to himself what exactly his big brother was planning.

Just before they reached the door, a sudden flurry of crashing sounds caught both boys by surprise. Windows all around the house were smashing, and in the midst of his fright, Blake saw several canisters rolling along the floors in the living room, kitchen and hallway on either side of them, leaking some kind of misty gas. "What's happening? Boys? Where are you?" Uncle Sam shouted while coughing somewhere upstairs.

Blake quickly tore several strips of cloth off from the sheets he'd wrapped around himself, holding them over Basil's nose and mouth as he led his little brother towards the back door and a haze of gas began to fill the air around them. By the time Blake got them to the kitchen, his steps were becoming increasingly heavy and sluggish. The world around him was looking more and more dizzy by the second. Blake tried to hold his breath, but the gas he had already inhaled was causing him to have a fit of coughing which just made him breathe more gas. He looked down at Basil, who wasn't faring much better and was already sagging towards the floor with his eyes only partially open.

"No... you can't... take us..." Blake mumbled as he fell to his knees finally just steps away from the back door, with Basil slumping onto his back next to him and already out cold. He watched the door opening through a haze, and several figures stepped inside, all wearing what looked like gas masks. Although the haze was playing tricks on the boy's mind and he was near to unconsciousness, he could clearly make out the faces of two of the figures through their creepy looking masks. Those last two images that Blake had in his head before his vision went black were those of Dr. Greenly and his son Billy.

~

When Blake regained consciousness, he couldn't tell if he was awake or asleep. It was pitch black all around him. Seemed like only a few seconds ago, he had been leaving the house with Basil... they were going to be on TV. Everyone would think they were special. But then... something happened. "Ohh... they... they knocked us out," the boy remembered, thinking again about the gas canisters and the sinister images of Billy and his father sneering down at him as he tried and failed to get his brother to safety. Blake couldn't see anything around him, but he could hear. He could hear himself breathing, and the light pounding of his enlarged heart. He must be awake, he thought. When Blake tried moving, he still felt a bit heavy and woozy. On top of that, the equine boy's movements were further restrained by what sounded like chains which dragged around whenever he moved his arms or legs. Blake tried testing the chains a few times, pulling his arms up from what felt like a hay covered wood floor. He could feel the powerful muscles in his arms flexing, straining the leather feeling cuffs around his wrists and the metal of the chains themselves. He forgot just how strong he had become since taking this form. However, he wasn't strong enough. Even after all of that straining, the chains held firm. Likewise, the cuffs and chains holding his legs in place seemed unbreakable as well. "Basil? Where's Basil?" he called out in despair after realizing he could not free himself from the restraints.

"Ah, you're finally awake," called a disturbingly casual voice from somewhere in the darkness.

"Who... are you? Where am I??" Blake called back, turning his head this way and that to look around, but everything was still pitch black.

"Oh, come now Blake. I should think by now you can recognize the voice of Dr. Greenly," the voice from the darkness replied. "And to answer your other question, you are inside of my laboratory."

Blake growled a little. It was Dr. Greenly and his scheming son who kidnapped him and Basil. But he didn't know where Basil was now. He couldn't feel him or smell him. His pulse started pounding a little as he became more despondent wondering where his Basil was and what they were doing with him. He pulled at his restraints again, huffing. "What is it you want?" he called out as he again failed to break free.

Dr. Greenly chuckled in a sinister manner, then replied "I want to see that magnificent body of yours again. Please show it to me." With that, a trio of pin lights in the ceiling turned on, focusing their light on the spot where Blake was forced to kneel by his chains. With the lights on, Blake could make out a little of his surroundings. He was in a dark rectangular room. The wall in front of him had a slight mirrored surface to it, causing a little bit of reflection so the boy could see his handsome morphic equine form looking back. There were also cameras pointing at him from all four corners of the ceiling.

"I don't understand," Blake called out. Then he gruffed again and tried pulling as hard as he could at the restraints. They creaked a little more, but still didn't give. Blake felt a powerful mixture of emotions as he failed to escape yet again. He was terribly frustrated, angry, and frightened all at the same time.

"Stop playing with me boy. We know that the large black shire was you. I've never seen such a massive specimen before, and I must study it further. Now, if you cooperate Blake and change yourself back into that form, perhaps I will retire you to some nice stud farm somewhere once I am done studying you."

Blake shook his head and huffed some more. Dr. Greenly's manipulative ploy just made him feel more angry. Besides, he knew that Dr. Greenly would almost certainly not keep his promise on any such deal. "Even if I knew how to change back, I wouldn't help you! You're evil!" he shouted.

Dr. Greenly chuckled again quietly, shaking his head "I see. You won't 'voluntarily' cooperate. We considered this possibility when we were attempting to induce the change before you woke up. However, perhaps your change requires a little more... motivation." At that, Dr. Greenly hit a few buttons and the pin lights shining on Blake switched off. Then, the wall in front of him began glowing with some light source that seemed to be coming from the other side. After a second or two, the wall started losing its reflective quality and instead became more transparent, like a giant glass window. Blake could see now that there was a room on the other side and a silhouette of someone facing away from the window, bent over what looked like some kind of table with their butt lifted and facing in his direction. As the light in the other room got brighter, Blake's heart started pounding again as he recognized the plump, white equine ass of his Basil, the boy's lush tail held up high in the air by a leather strap circled around its base and tied to some sort of collar around his neck. With the boy's tail pulled sharply up and out of the way, his big pudgy black horse-pucker was in clear view, yawning slightly from the firm pull on his tail. Basil's pillowy white buttcheeks were slightly spread apart to keep him fully exposed, with his legs secured by leather straps to the legs of the table. The boy's swollen milky balls were swaying slightly between his thighs, sagging heavily against his thick shaft and the edge of the table. His pristine, soft black shire penis was hanging down about a foot between the boy's legs and flexing every few seconds. Blake growled again and strained ineffectively against his chains. His huffing grew more pronounced as he saw his brother all spread out like this, his blood pumping hotter and despite his despair, the boy's stallion arousal was growing bigger and bigger, dropping heavily over his thigh and flopping lewdly against the floor. His tail felt like it was growing longer again. The straps on his arms and legs stretched as the boy's limbs expanded a bit and he flared his nostrils, trying in vain to get his Basil's scent.

Basil looked like he was asleep... or maybe just knocked unconscious by one of Dr. Greenly's drugs, as the boy barely moved at all, just breathing slowly and instinctively hugging his big horse plush between his chest and the table. "Let him go! He's mine!" Blake whickered and tossed his head, practically seeing red as the boy's stallion hormones asserted themselves more forcefully and his mind became more affected. Not only were his limbs suddenly seeming larger, but he looked to have gained several more inches in height as well.

"So, you use your poor little brother just like your property huh? How rude of you Blake! Well, he's all mine now. I'll show you how to use him properly," Dr. Greenly chortled over his microphone. Blake kept pulling on his restraints, then tossed his mane again and huffed frantically as he saw some large device lowering from an open panel in the ceiling above Basil. It looked like some kind of robotic arm, and attached to the end was what appeared to be a massive rubbery phallus. Its shiny, dark purple surface was molded into the shape of an equine cock, and its enormous length and girth seemed even bigger than Blake's own when he was in his four-legged form. Attached near the base of the phallus were a set of four translucent hoses hanging from the ceiling. A fifth hose hung down separately, long enough to reach to the floor. The giant "toy" flexed and throbbed realistically as it lowered and squished its massive flared head across the inside of Basil's right flank. This elicited a soft "ohhh..." from the boy, his ears flicking about. Basil shifted his head a little while squeezing tighter on his plushie, and Blake could hear a -clang clang- sound as Basil moved. It sounded like there was a cow bell attached to the boy's collar.

Dr. Greenly continued speaking in his matter of fact tone as he operated the machine from some unseen location, "Ah yes, I noticed something strange about Basil's genes when we were testing him - high levels of bovine material mixed in, so I thought the bell would be particularly appropriate" he said while snickering again. Blake huffed again, remembering how much Basil's scent and taste reminded him of his cream addiction. He wanted some... craved some, practically drooling as he struggled again against his chains and his vision stayed locked on Basil's thick white shire ass and the boy's big milky nuts. With that, the robotic arm made a pistoning sound as that giant purple flare tip was shoved forward under Basil's tail, smothering the boy's big black tailpucker. "Ahhh..." Basil moaned softly, his eyes still closed, though he seemed to be waking up a little as he felt the intense pressure of that massive girth plunging the stretchy flesh of his equine ring. Blake growled again as he watched, hearing Basil's soft whimpers and the clanging of his bell again as the huge flare tip throbbed powerfully under the boy's tail and one of the hoses attached to the device began writhing as it filled with a translucent liquid which began to pump through the phallus and directly into Basil's ass. The force of the fluid alone did wonders for stretching Basil's inner walls with its liquid pressure, quickly pumping up the boy's insides and erupting back out of his pucker around the sides of the huge flare tip, drenching his inner buttcheeks and the first half foot of the phallus with a shiny layer of goop. For at least twenty seconds, Blake watched the hose writhing and pumping powerfully, while Basil moaned again and again as his ass was bloated with the gooey fluid. The goop made a webby mess of the faux horse cock jammed up under his tail as well as the boy's quivering rump and his soft white nuts, which by now looked like they had each swollen a few inches in diameter.

Blake's vision was a bit blurry now, the boy's head pounding as he watched the maddeningly erotic actions of this toy on his colt. His stallionhood was not only flopped out over the floor, but was quickly throbbing up in size and length... already well over two feet long and flexing up and down so that it slapped the ground repeatedly in a puddle of his own pre-cum. He could tell his hoof-hands were starting to transform again. They were growing larger and harder, broadening out... slowly taking on the shape of big shire hooves again. There was another pistoning sound and Blake saw the phallus jerking forward again, shoving Basil's hips more firmly against the edge of the table while the boy's excessively lubricated horse pucker was forced to stretch bigger by the huge throbby tool. "Ohh... Blakey" Basil called out softly in his half asleep daze, his legs looking kind of wobbly as he was forced to stretch even bigger by another sudden jerk of the fat rubbery phallus. Already, the boy's inky black shire pucker was yawning obscenely against the phallus' gigantic flare... it was almost in, more pumps of that lubricating fluid splashing all over the insides of the boy's trembling ass, causing every little slippery flex or thrust of the flare to make an incredibly lewd schlop noise.

Blake tried not to watch. He understood what the doctor was doing to him. He was insanely aroused and frustrated. He wanted Basil all to himself. His stallion hormones were on fire which was just accelerating the changes. He tried holding back, "No... turn it off..." he moaned. He wished he still had hands, since his huge black shire cock was nearing its full size now and was buzzing wildly with pent up pleasure. His whole body seemed to shift forward, bone structure re-aligning itself with several cracking sounds as the boy was forced more onto all four of his hooves. The cuffs on his rear and front legs were being strained and stretched wider by the accelerated growth of the thickness of the stallion boy's limbs. His enlarging ears flicked about, hearing the creaking of the chains as his four-legged equine form expanded. "OOhhh.." he moaned, unable to fight it... he opened his eyes as his body rippled with pleasure, his muscles blazing with blissful sensation as they surged in size, his buttocks flexing as they plumped up bigger and bigger, his balls churning as they sagged heavily between his hind legs and his fiercely aroused cock jerked up and down under his swelling equine form, slapping himself repeatedly as he gained rapidly in height and weight.

"Good boy..." Dr. Greenly said smugly over the microphone as Blake's transformation began to peak. "Very soon, you'll learn to obey with no hesitation..." he said while pressing a few more switches. Blake shook his head and mane, trying to speak but instead neighing sharply as he watched the rubbery purple phallus suddenly plunging forcefully right into Basil's plump white ass, the boy's whole body shifting forward again on the table from the force of that thrust. He cried out in his soft voice, his plump black ring gaping massively over the slippery purple shaft as it stuffed its flare several inches deep with the excessively sloppy maneuver. By now, the hose with the translucent fluid had stopped pumping and the huge throbby tool just stayed buried in Basil's trembling equine butt while the boy whimpered and gasped again and again each time the robotic "toy" gave the slightest little jerk or pistoning movement. Dr. Greenly interrupted Basil''s moans with another cold observation, "Now, we're going to test the completion of little Basil's... transition... he seems to have only ingested three full pills. We'll have some more hormone 'supplements' for our little cow too," the doctor chuckled again. Blake was so hot and bothered that there was practically smoke flaring out from his big equine nostrils now, and he glared and snorted at the machine having its way with his colt. At this moment, the shire stallion finally noticed the marking on the attached tubes, the one with the translucent fluid labeled with scientific sounding names which he didn't understand, and another had "hormone enriched cream" written on it. The other two were labeled with "Peaches - sample #152" and "Peaches - sample #153," along with today's date.

A few seconds after Dr. Greenly finished talking, a door opened at the side of Basil's room and a man of medium height walked in, carrying a silver tray with a single pill and a set of brown leather straps that looked like some kind of a harness on it. Blake huffed in apprehension as he saw the man approaching Basil, figuring he must be one of the doctor's goons. Strangely, the man was completely naked, and he was also clearly not a "normal" person. He looked to be in the early stages of effects similar to what the boys had experienced. His ears were more fuzzy and equine shaped in appearance, and his hips and butt had a more pronounced curve to them. Perhaps most striking, the man's cock and balls were almost completely equine in shape and at least twice as big as a normal human's. Blake neighed again, his chains creaking again as he tried rearing against the restraints while watching the man walk non-chalantly over to Basil. With that enormous rubberized horse cock stuffed in his throbbing ass, Basil was awake though still slightly groggy, "B...Blake... ohhh... ohhh.." he spoke softly while his flanks were jostled back and forth by the rhythmic jerking of the massive shaft. Stopping right in front of Basil, the emotionless man held the pill in a few fingers and pushed it right into Basil's mouth while he was still moaning. Still in his haze of intense stimulation, Basil chewed a little and then just swallowed the pill with a few flicks of his ears. Blake watched closely, his eyes scanning every inch of the younger boy's silky coated body as the fourth pill began to work its magic on him.

First, Basil's fuzzy feet began broadening and showing the same harder surfaces that Blake's hoof-feet had before. The younger lad gasped, shifting his legs as the drug caused this buzzing sensation to pulse up and down his legs and rump again and again. His butt quivered and bucked suddenly against the big phallus, already showing more than a foot of that massive girth plunged inside of him and bloating the boy's oft swollen tummy with its slippery heft. The machine seemed to almost sense the boy's more eager bucking, and it slightly increased the pace of thrusting the huge toy, more and more and more sloppily under his uplifted tail while his big shire buttcheeks were made to jiggle with each wet slap of the boy's butt with the shaft. "OOhhh.. oOHhh" he moaned louder, blushing strongly now as he felt the effect of the pill dramatically heightening his sensitivity to the mechanical thrusts. Basil's milky, swollen grapefruit sized balls were plumping and swelling again as Blake watched them slapping back and forth from the soft bucking of his hips and butt, and likewise the boy's fourteen or so inches of black shire cock was gradually expanding out to eighteen inches, then reaching that amazing twenty one Blake had gotten him to before. This time though, Basil didn't stop at twenty one. He blushed harder along his ears, the boy's pleasure rapidly mounting higher and higher as his intensely sensitive shire cock throbbed and jerked bigger still, just past the two foot mark. He was practically squealing with pleasure now, as the "toy" phallus plunged several inches deeper, swelling out his belly more while its gigantic medial ring was slapping very wetly against the boy's ridiculously stretched, puffy black horsepucker. Once the medial ring was jammed against Basil's ring, the toy made a strange clicking sound, suddenly stopping its sloppy pistoning and instead switching to a powerful electric buzzing. Basil squealed again helplessly as his big prostate throbbed and jerked wildly against that buzzing, the boy's larger shire-dick plumping along its length and starting to shoot out big heavy shots of his goopy translucent pre-cum against the legs of the table. The boy's bliss heightened and he gasped and started bucking his big shire butt on the buzzing toy, his hoof-feet shifting again... more solid and round... then finally, the boy's hooves were fully formed and growing in size to properly reflect his shire breeding.

Just as his hooves were finished growing in, the boy's quivering ass looked to gain a bit more size, his buzzing horseboy-pucker gaping more and swallowing a bit easier over the massive girth shoved deep inside. The boy's overall body grew slightly larger at the same time, as well as slightly more curvy. His tail was longer... the boy's pretty, fuzzy ears even more prominent than before. Then, last but not least Basil's cute boyish face gradually shifted and elongated, growing a suitable horse boy muzzle as his head took on a particularly adorable equine shape. Dr. Greenly's assistant was there to begin affixing the halter onto the boy's developing equine head and muzzle, pulling the straps snug and then leaving the reins on the end of the table. Basil seemed to barely realize the halter and reins being strapped onto him, the boy was so busy moaning and bouncing his jiggling shire butt against the huge buzzing toy. "Ooohh... OOhhh... Ohhh.. B...Blake... Ohh.." he said deliriously, hugging his plush tighter against his chest, the pleasured look on the boy's new equine muzzle making it clear he was extremely close to a huge gusher. The assistant set the platter down and walked the length of it to where Basil's horse-penis was slapping erotically against the table leg, drenched with pre-cum. He bent down, briefly showing his ass to Blake's fixated gaze, while grabbing up Basil's cock and shoving his flare right into the open end of the fifth hose which was still hanging freely, forcing the stretchy rubberized material to bulge quite large in order to fit Basil's broad tip. He pulled a strap on the end of the hose tight, squeezing it securely over the throbbing cock-flesh, then walked back to the front of the table to take a hold of Basil's reins and pull them taut.

"Yessss, just as I'd hoped..." Dr. Greenly commented coolly as he observed Basil's completed anthromorphic body. Blake's mind was almost totally lost to his surging stallion passion. He had fully transformed back to that magnificent, giant shire stallion body. His black coat was gleaming with sweat and his powerful equine muscles were tense and quivering as he huffed hotly, still trying to breath Basil's scent and rearing against his chains again and again. Every time he heard Basil moaning and whimpering with pleasure, his own giant black shaft jumped up under his sweat-slickened belly. "Now, the injections," the doctor stated as the toy stopped buzzing. It made another sudden pistoning noise, then Basil's rear end was lifted up, the boy's hooves coming off the ground momentarily as the big purple phallus thrust powerfully, causing Basil's whole body to bounce while his plump shire ass smacked lewdly over it. The toy bucked the boy up in the air again, making another slick plunging noise... then another, the fat medial ring jiggling sloppily into and out of the moaning shire boy over and over. Dr. Greenly's assistant pulled up on the boy's reins again, causing his cow bell to jangle and clang melodically with his sweet moaning. Basil's milky fuzzed balls were bobbing up and down heavily with the constant bouncing, having swollen back to their impressive cantelope size, they rolled and slapped prominently like a pair of big milky jugs along the boy's thighs. Suddenly, the hose marked with "cream" and the fifth hose attached to the boy's jerking shaft started filling with the same thick, pure milky colored fluid. Both hoses started writhing as they began pumping forcefully, just as the translucent hose did before. Basil clenched his eyes and squeezed his fuzzy white digits over his horse plush harder as he felt the creamy liquid pressure first on his huge throbby flare. It felt a lot like Daisy's cream, only this stuff caused an almost instant tingling sensation as it touched the boy's flesh and it was pumping a lot more forcefully than hers was. "OHhhh... Ahhh!" he gasped as he felt the pressure growing and growing against his flare, forcing his cum-nozzle to bloat as cream pumped into it. The tingling created a much more intense sensation inside of him, causing the whole length of the boy's shire cock to spasm and writhe.

The tingling sensation was no less erotic pumping into Basil's equine ass as the giant toy continued plunging, deeper... deeper... His vision almost went blurry within seconds as his minimal bovine hormone levels were dramatically increased, his sensitivity shooting through the ceiling. Without the pressure of the hose pumping cream against the boy's heavy cock, he would have blasted a titanic eruption in that very instant. Instead, he bucked his cheeky flanks on the toy for several seconds while crying out orgasmically, his heavy balls and swelled prostate pumping and bloating with his backed up fluid. Blake heard the cowbell clanging again, Basil's head pulled up again by the reins as the boy cried out again as more cream pumped against his cock. He could see the black shaft jerking as it bulged visibly with the rich fluid, taking pump after pump after pump. On the other end, tiny splurts of cream were splattering out over the pistoning toy, while most of the potent fluid pumped deep inside the cute shire-boy, rapidly swelling his guts and tummy so he could no longer lay flush against the table. Basil's tongue hung out of his pretty equine muzzle, the boy's cock spasming wildly with the hormone rich cream... his butt trembling and bucking sloppily over the giant phallus, and those fat jug-like balls of his were swelling ever larger, and heavy and creamy. He almost looked like he couldn't take any more, his body trembling all over and the boy constantly moaning and bucking, practically begging for the erotic filling to stop. That was when the other two hoses marked with "Peaches" began to fill. Like the first two, their fluid was milky in color but it was much thicker and goopier. With both feeding into the giant horse phallus stuffed into his guts, the liquid pressure Basil was feeling in his quivering flanks grew dramatically once that pumping started and the boy squealed again and instantly was brought to orgasm a second time.

The heavy goop tingled intensely like the cream, though it seemed to stimulate his equine hormones. The boy's shire cock gained a bit more girth, flailing wildly against the hose attached to it. He felt like his prostate was growing in capacity again, buzzing and throbbing with every pulse of his heart. The big toy plunged back and forth with more force inside of the boy's bouncing butt, lifting his hooves off the ground again with every sloppy thrust. "OOhhh... god... OOhhh.. OOHhh" with the cream and that thick goop pumping simultaneously, the boy's tummy kept swelling... bigger and bigger and bigger... a veritable flood of the stuff was now splashing back out of him, bathing his inner buttcheeks and his balls and thighs with the heavy mixture which pooled on the floor beneath his hooves. The boy's giant creamy nuts almost felt too big to manage between his thighs, like enormous melons bobbing and slapping around as he was bounced repeatedly by the toy. "YESSsSsssssss" he cried out, hitting a third orgasm... but still, insanely backed up. His balls and prostate were spasming wildly with pleasure so intense it was almost painful. Already, the boy's cute white-fuzzed tummy was swollen much larger than before, making him look twice as pregnant as when Blake had filled him. Yet, the pumping didn't stop... Basil cried out again "OOHhh... PLeaase!" his need for release blowing through every such peak the young boy had experienced before.

"See, we'll take better care of him here," Dr. Greenly said again in his smug tone while Blake continued rearing against his chains, watching his colt moaning and begging... his pulse was raging and he wanted so much to hold his Basil... or at least have his scent. Finally, Dr. Greenly shut off the hoses. As the last of the fluid flowed and pumped against the bloated colt, Basil gasped and cried out a little softer. His unbearably inflated spheres continued jostling up and down under his plumped ass, sloshing so heavy the boy would likely have a hard time walking. His heavy black equinehood continued flexing against its hose, still throbbing wildly with the pulse of his pounding heart. Dr. Greenly's assistant pulled at Basil's reins a few more times, getting a couple more jangles from his cow bell before leaving the reins on the table and walking steadily over to the door he entered from. "Don't worry Blake, once you are well trained perhaps I will let him come and pet you now and then... for now, however, I'll be letting him get acquainted with his new stable mate... this one was one of our early experiments." As Dr. Greenly finished speaking, the assistant was leading a modestly sized pony through the door by his reins. He had a very lovely looking soft golden/reddish colored coat, with more cream colored tail and mane. Overall, this pony was quite cute looking and might have been a popular attraction at a petting zoo or other family friendly establishment... if not for the massive endowments swinging side to side underneath him as he clopped behind the assistant towards Basil. Despite his short stature, the cute pony's mottled horse cock was at least as large as Blake's... possibly even bigger. His black fleshed balls were similarly excessive in size, and the whole wobbly package looked like it didn't properly fit on his somewhat stumpy, plump body. "Yes, I think Basil will make just as good of a lab experiment as Peaches has been..."

Blake could hear his chains creaking more... The restraints were shifting... even loosening a little. He was so close now... If he could break these chains and crash through that wall, maybe he could get Basil to safety. "Now now Blake, I think it is time for you to have a little nap. We will continue with our tests on you shortly," Dr. Greenly said. Just then, a hissing sound started to come from some vents in the ceiling. Blake neighed and shook his head in frustration. He could do nothing as the haze from the gas began to settle around the room, gradually filling his big lungs. The black stallion slowly started to crouch down as his vision grew dizzy, still pulling at his chains... fighting until the very end. As he blacked out, he saw the pony, Peaches, standing next to Basil and sniffing at his hips and flanks. He silently promised Basil he wouldn't let Peaches take him away.