R.A.T. Labs - Filling an Eclair

Story by CanaiCreations on SoFurry

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This art and the story underwent several edits for me to try improving on both telling and visualizing a story I myself would enjoy. Thanks to those who helped give some feedback, I'm proud of doing some self-focused work so that my customers get better and better pieces from me!

Villo and Eclair are my OC’s, don’t use them without permission please.

Story by me.


Welcome to my revision of the original attempt at expressing, sharing, and enjoying kink-heavy content behind the excitable mad-rat, Villo. This time I’ve placed Eclair at the center of my first experiment, having done several edits/additions to the story more in line with what I like to read myself, heheh...I also worked on the art edit, improving (hopefully) the lab light/shadows on that immense bunny body!~

Let’s see if this Eclair enjoys getting her fill of cream, shall we?


Eclair sighed while double checking the address on her phone, then the offer above it: “Seeking volunteer for groundbreaking new protein compound, compensation for the first at the grand opening!”

The bunny looked upward to the gleaming new building of metal and glass, with a large banner hung across the double-doors in front repeating the promotion. The chocolate colored bunny didn’t want to be caught dead here, she wasn’t some science geek, just in need of some extra funds on the desperate side.

“This better be worth my time.” Eclair grumbled before starting forward, walking through the quiet hiss of the two glass doors, definitely standing out in her goth attire; grey and black striped sweater with extra long sleeves, hip-hugging black shorts above fishnet leggings that made her plush thighs look more so.

She walked into a sizable lobby with several seating areas, panels blinking numbers or lights, and a desk on the far side with a small rodent secretary typing away on a computer. With raised brow Eclair approached and held up her phone to show the ad.

“So uh, I didn’t see an appoint-”

“Ohhh! You did it, yes-yes! Our first client, the reward is yours.. After, the trial-test.” The rat girl chittered in gleeful, matter-of-fact tone while adjusting round glasses on her snout.

“...Great, now what?” Eclair got a weird vibe from the way this girl spoke, watching her swivel over to press an intercom button with a delighted squeak.

“Doctor, you have a subject, erm, winner to the contest-test!”

“What?! Really, someone actually showed?” A series of fumbling noises, like papers flying and possible a glass dropping were heard on the other end as a male voice replied, “Send them in right away, good work Villa!”

“Heh! Please follow me this way-way, miss…?” The secretary hopped up with a tablet, entering the bunny’s details by sight first before questions as they walked toward one of the several sets of doors about the circular space.

“Eclair, and is there some kinda y’know, waver I should be signing first?” The gothbun frowned as getting paid began to take a backseat to what she might be walking into.

“Ohh, like the sugary treat? Your mother must’ve like-loved sweets, hehe!” Villa chitter-squeaked with a broad smile, only to wave a paw, “No-no, everything is perfectly safe here, and the Doctor can undo any lingering effects!”

“That’s…not exactly reassuring, or legal sounding?” Eclair huffed out, folding her sleeved arms beneath her bust as they went down a lengthy, sterile hallway one would in a hospital.

“We can arrange for paperwork-forms if you insist, but remember, you’re being handsomely compensated for being our first entry!” Villa waggled her wiry tail, eyes hidden behind the reflecting glasses on her face, “Now, please fill in the remaining blanks, then step-walk into the prepared section ahead!”

Eclair took the tablet from the rat, tapping through several info-bubbles about herself from height to weight, which was on the shorter and plumper leaning areas. Her maple colored eyes glanced over the scrolling page, dark makeup about them matching her lipstick shade.

“Okay, here you, but this better not be some fucking scheme, got me?” The gothbun frowned with a glare, but the rat only gave a finger wave before scurrying away, leaving the rabbit alone at the last doorway before the experimental area.

“...How’d I get so low, risking my tail for some cash? Fuck…” Eclair exhaled the curse before walking to, then stepping through the two smooth doors. Inside was a startling huge square room, reaching high and far with countless little lights, especially some in the floor indicating where one should walk toward the center.

“Ah, welcome Eclair! My gratitude is boundless for your help, and I swear-promise, you’ll be rewarded immensely.” Came the same male voice she’d heard before on the intercom, the same thrilled tone in it giving away the delight at this chance, “My name is Villo Decotious, I’ll see to your progress!”

“Y-yeah, sure, I better be or I’ll sue the hell outta this place!” Eclair looked around with a glare, finally spotting the blacked out section of glass he must be behind. She could vaguely make out a pair of green, glowing lenses peering down at her behind the glass.

"Now-now, please stand just over there by the silo and- yes, very good! See that nozzle? Just place it into your mouth, we’ll have you try a few samples, if you would!" Villo squeaked excitedly over the comm, watching almost ravenously as the dark-haired beauty came over to do as instructed.

Eclair hesitantly placed the nozzle into her mouth, ears perking when the machine thrummed to life with a rumble, drawing out the unique compound created to provide a wealth of protein and nutrients at minimum, enough to feed whole gatherings at once. Eclair watched the hose bulge as the vanilla-hued, shake-like substance ran down the channel before greeting her maw, getting her first taste of the mixture.

It was surprisingly pleasant, not too sweet or chalky as expected of other protein supplements as it coated her tongue. In fact, it actually tasted better than anything the bunny recently ate, enough she began to swallow mawful after mawful with a paw holding the end of the nozzle.

"Mmmnph..." Eclair blushed at the muffled sound she made, eyes widening then darting up to the rat in his unlit space above even as her mouth and throat more readily worked in more of the compound.

'Fuck, hope he didn't hear that...what's with me, it's not -that- good!' Eclair thought while gulping down on the constant flow, not aware her soft middle had begun to puff out against her shorts, or that she had already completed the required few samples to give approval.

"Most helpful of you to come-visit my lab Eclair, you’ll forever be a cornerstone of my work…" Villo chittered with a slow clasping of his paws, "Is the flavor enjoyable? Nothing bitter, no? I work-slaved over a delightful taste for all…”

"Mmhmmph..." The gothbun nodded with the nozzle in her paw and muzzle alike, cheeks puffed out some from the continual flow of the thick mixture, blushing further with slightly lidding eyes. Now the bunny was softening elsewhere, thickening up inside of her attire as she gulped down more of the perfected shake-mix.

Something in the back of her mind, maybe that rabbit instinct of danger went off, only it wasn’t enough to dull the new, more powerful urge cascading through that brain. Cravings. Hunger. She’d never felt so hungry despite what must’ve been several shakes worth down her gullet by now.

That cream-colored belly swelled slowly and steadily, pushing against the confines of button and zipper before the first gave a soft 'pop' and the later came undone when her stomach rounded further with gurgles, sloshes of relief only she could hear, “Nnpph..!”

Eclair felt those fishnet leggings growing tighter about thickening thighs, fattening bottom pressing to the hem of the material, giving the bunny who'd walked in a far heftier figure. She’d always been a foodie, especially bored or out with friends, but now, it was like she couldn’t get enough of the nourishing, sweet, filling mixture.

“My…you’re positively exceeding expectations, Eclair. Excellent, just excellent!" The rat chittered in delight as screens about him scrolled with incoming data while cameras, sensors, and panels in the floor beneath the growing rabbit recorded constant data.

Eclair huffed from her nose at his glee, what was the big deal? Villo acted like this was some miraculous breakthrough, but she was just drinking some diet mixture, right? Although, Eclair squirmed her gradually fattening thighs together, feeling warm and pleasant all over as those thicker legs more easily rubbed while straining inside those leggings further by the moment, shirt rising along as her middle rounded outward. She’d certainly need to skip a few meals after this, maybe go to a gym for once in her life…yeah, right.

'Tch, shouldn’t this stop…any second now, r-right?’ Eclair thought to herself even as her throat bulged slightly at the plentiful flow of the mixture, absently rubbing a far fatter, lower belly with her free paw even as it bloated more, and more. The contents sloshed with so much flowing inside, adding to the already working substance making that stomach swell bigger, fuller each mouthful.

And Eclair had never felt so very full before, certainly never indulging at any meal to get to the point of being a glutton, but the smooth flow rewarded that new desire and overrode the notion of stopping; no, she couldn’t stop, it was the only time something so delicious would come her way for free! Might as well get her money’s worth out of the rat, right?

A few seams split along the sides of each leg, exposing cocoa hued fur between the ripping leggings as that figure grew, getting more plump by the moment as the bunny took in larger mawfuls now, she pushed on past double the original weight she'd entered with ease.

By now the flow had increased to make the hose bulge past her paw being able to fully grasp, giving Eclair mouthfuls at a time that she had to audibly gulp down to keep up, muffled moans as the rich shake-stuff went down her gullet. With a defeated rip of fabric, the back of her shorts tore open to reveal clasping black panties, two hefty cheeks pushing outward into the gap.

"Glllph...nngph...mmmph..." Eclair was less aware of what the potent mixture had done even as mawfuls of it went into her expanding middle, crafted to appeal to any and all tastes, it simply signaled the brain to intake more, which logically should have been a few spoonfuls, but instead came from a towering vat before her.

Her growth was accelerating now, matching the rumbling in that rounding, fattening creamy middle that had to hold so much of the stuff. Eclair looked around the space as if she should say something, give a signal or just yank the nozzle out…yet, her pudgy fingers only held on tighter, her maw suckled hungrily instead for the next throat filling delight.

Finally, Eclair’s loose sweater escape the outward growth, that ample creamy chest having blossomed much slower at first, but now swiftly grew against the confines of bra and fabric in sloshing surges. Her small bunny tail twitched rapidly as her body got what it thought it wanted, constant nourishment at a mind numbingly good taste, guzzling down on the flow that was causing her once plush figure to grow drastically.

“Mnngllph…gnnnph…mmhmmphh…!” Eclair lost more of herself by the minute as she felt the cool, thick mixture slide down her ravenous gullet, pooling inside that now immense belly. The gurgling slosh of it made her toes flex against the metal flooring. Her features got rounder, the black choker about that fattening neck giving a final ‘snap’ as it widened, softened out like every other inch of her.

Once it was easy to consider Eclair a bigger woman, more cushion than the average gal but with only a slight roll here or there when she moved about; now though? Now they were appearing, rippling along each cocoa-hued side, above a set of hips wider than any sofa would handle. No wardrobe would hold the ponderous size she’d become, or would again as that drooling maw was pumped full of that decadent flow.

Villo stared at each monitor for a few lingering seconds of amazement, more than pleased with the rapid rise of performance numbers, the glowing green of each goggle lens hiding the no doubt beady eyes of delight. The thought of shutting off the flow from his console room didn't occur, not when the progress exceeded his wildest hopes, and still the numbers rolled upward across several screens.

'How long...was this supposed...he’s n-not turning it off…right?' Eclair blinked lidded eyes, ears splaying even as her lips and throat worked to take in more, and more, and more of the shake-mix like a glutton. Her striped top had already risen upward from that overdue looking belly with extra plush, leaving the creamy stomach exposed as it bloated rounder, heftier from the gallons that now sloshed within.

Remarkably that poor top strained about the seams against an impatient swell of her breasts, which fought against the creaking hold of bra strap and cups alike. Those mounds rose upward, pressing together and against the softer neck and chin of the bunny with sloshing threat, before the audible 'snap' of failing clasps let immense breasts burst free to bounce about.

Fur and plush bulged against the lacey fabric of her panties as that figure expanded into that of a far more gluttonous bunny, the usually oversized sleeves of her black and grey sweater frayed with arms bulking, straining the soft fabric. As Eclair’s entire frame grew outward, the weaker clothing tore apart in shreds from those midnight panties to sweater, falling away from a rumbling, expanding figure in defeated pieces.

"Ngphh! Mmnnppph…!" Eclair groaned in relief of that pressure, wobbling in place from it even as her attire fell away in defeat as her figure pushed at, split, and ripped open the remaining threads of that growing body in greater surges.

She fell onto her now considerably fatter backside with a rumbling thud that saw those new curves and rolls jostle widely; but, thankfully she was cushioned on such a massive, pillowy ass it didn’t hurt. Eclair even managed to kept a hold of the nozzle with greedy paw and muzzle alike, never once ceasing in that starving gulping.

“Mmormmphh! Ooompphh! Hhhnmmggpph!”

Now the rabbit could only sit with doughy legs splayed, lost in the euphoric sensation of the nozzle filling her muzzle to the point of cheek-rounding fullness, having to swallow in swift muffled groans before the next generous helping came. Chocolate limbs grew ever softer, fatter as the compound swelled inside her stomach before earlier doses could even begin working, which only made the bloated, engorged bunny more immense in an up and outward rise.

Eclair reached up to grope half-aware at one of her now enormous breasts, pudgy fingers sinking into excess fur and plush give in a hefting jostle of what was now a vastly swollen udder, with each pierced nipple throbbing in blissful pleasure from the pressure of such growth behind them. Few could claim to have half the bosom she did now, shaming even the most gifted bovine with such cream-hued rises.

'It tastes...feels so...good...I can't...stop…!!' Eclair mulled over in a fog of bliss as her paw clasped the plentiful rise of creamy breast atop a monstrously round, ponderous belly, tail twitching about in oblivious contentment even as its owner grew, and grew while the compound worked its rapid release as it was meant to, but amplified with each audible gulp of her throat, ‘M-more…moooore…please, g-give mee…mmooOOORE!’

Progress was an understatement as Eclair’s growth became rampant, from bigger softening limbs to an immensely full stomach she’d never hope to reach around again, while it pushed apart and rose outward between each vastly thickened thigh. It was clear Eclair was more belly than bunny now, unable to lift or move herself with those fat arms pawing at the feeding tube or her own overly engorged teat, let alone try to stand with helplessly splayed, weighty legs that made her footpaws seem like a stuffed animals.

That taut, yet doughy stomach now contained just a half of the unique creation from the tank behind the immobilized bunny. There was only the urge to clasp the funneling tube, gulp down the next maw filling surge more like a greedy pig than any rabbit should, and bask in the waves of euphoric growth.

"Gnnllphp...mmlgh...gnnnllph...ooummnph...." The bunny stared into space with a blissfully hazy expression as the rat chittered in mad glee from his control room, uploading the streams of data and already prepping the next batch for production with this clear, unbridled success. His paws trembled while hovering over the panel that would shut down the vat, feeling a chill as the whispers returned.

“Leave the rabbit to enjoy herself…clearly she enjoys the process, why stop it?” The teasing, taunting whisper like smoke caressed his stimulated brain, causing his breathing to become shaky, “...let her enjoy the rest, let the dumb fat rabbit gorge herself, until…”

“N-no…no!” Villo flailed his arms as if he could clear that smoke, panting as he quickly powered down the machine, making sure to remove his personal key to the device before pocketing it. He ran a trembling paw through his wild-looking hair, “I am not my father…not a monster.”

“Not yet…but you’ve already -made- plenty of monsters…” The whispers were barely audible now as Villo reached down, dialing up a slender notch on the green-glowing device on his belt, “...we can wait, always…watching…”

Once the dosage was higher, the chittering voice was completely gone, much to his relief. Villo peered down through his station’s tinted glass, seeing the massive shape of Eclair pawing absent-mindedly at the now empty funnel for more.

"Yes-yes…my greatest, biggest success, but no ill-results this time.” He said to himself before punching the intercom to praise the immobile Eclair,” Ahem! I am ever so grateful you offered to help me in such a -huge- endeavor!" Villo grinned widely from behind the dark glass, bright green lenses staring at the engorged, bloated gothbun below, “I’ll see to it you’re compensated well for this, my dear…yes…yes.”


Thank you for those encouraging me to improve my art, share the ideas and content I enjoy personally; I wanted to double-down on this original idea, and using Eclair let's me do so with wholly my own creations/OCs.

Here is the full art piece of what became of Eclair during the story: https://www.furaffinity.net/view/59255560/

Want to see more works like this, or even art to visually enjoy this sort of content? Please help keep the lights on at my Labs here:

https://ko-fi.com/canaicreations14245

Villo and Eclair are my OC’s, don’t use them without permission please.

Story and art by me.