Wobbledogs

Wobbledogs is a 3D pet simulation where you raise your own personal hive of rapidly mutating dogs, physically simulated all the way down to their guts! It’s a casual and chill sandbox experience for players of all ages who want to care for their very own virtual pets in a surprising, unique, and stress-free environment. The dogs start out relatively normal, but mutate and behave in surprising ways as the game progresses and their evolutionary lines advance.

Dogs have highly variable bodies controlled by a simulated genetics system. As they age, they periodically enter a pupal state and physically mutate. The foods they eat fill their guts with different flora, just like in the gif above.