It's kind of hard to swallow sometimes (commission for Rami2004)
“Oh, I guarantee I won't make that a problem for you." Alban was literally the stuff of legends, and that had always made this kind of thing hard. His appearance alone, even if the viewer had not a single mote of awareness of his status and power, was...
Rainbow of Dogs
Sparkledogs are also able to safely digest anything that wouldn't be physically dangerous for them to swallow. as long as something doesn't pierce or dissolve their stomach lining, it's as much food as any other food (mmm, aquarium gravel).
Carnal Demonology Volume 4
Nomnoms belong to the ooze family, and are capable of safely digesting meat, instead of surviving on an all liquid diet. their bodies are black as tar, and just as adhesive, making them very difficult to escape once they get a firm hold of their victims.
Changeling, the Dreaming - A Basic Introduction
They have the magical ability to safely digest anything they can swallow, which is quite a large list, due to their teeth being razor sharp and strong as metal.
Potions; Fantasies Made Real
Vore as a concept beyond just a fantasy was still pretty new and klyneth was the only area in the world that had found a way to make it safe for those not naturally gifted with a safe digestive system.