perhaps this is one of the most bizarre yet interesting chats I’ve had with a friend- here is our “theory”:
CatDog share one stomach, and they both poop from the mouth- as in they take turns.
anatomically, each of them has 3 internal tubes, (like humans separating air from food)
(total of 6 tubes *3 per head): one for air, one for food, one for waste
the food tubes from Cat and Dog connect into one shared stomach with multiple chambers (like in ruminants eg cows). the first chamber is like a collection zone where all the food gathers (by one tube from Cat and one tube from Cat). from there, it gets mixed and moves into the other chambers, then intestines. at the rectum (end of the large intestine), the tube (carrying the waste) splits into two again. that’s where the digestive tract branches- one path toward Cat’s mouth, and one toward Dog’s.
yeah that’s about it hehhe.