AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA oh wait were friends because doulingo is a chocolate muffin
Having owned chickens, I can tell you that they will eat just about anything, including, but not limited to: themselves, other chickens (alive or dead) moldy and rotten food, blood (chickens instinctively peck at the color red. Thus they will shred another chicken if it has as little as a papercut), and even their own eggs. But they also really like bread.
I've seen cows eat a burger. They are animals. They have no idea what they are doing and why. I've fed my chickens leftover chicken before. And therefore it is not cannibalism since they have a brain about the size of a peanut, meaning they have no clue what they are eating. Chickens are little vacuums, they eat what is put in front of them.