My domestic rabbits will chew on each other if under undue stress.
The mommas will flat out eat babies if the cage conditions or her health are not right for a litter to thrive.
Rabbits eat their own poop, too. Carphopagus... They re-eat their waste to recover more nutrients. Sometimes called night pellets, the incomplete pellets are a soft yellow-green, while the completly used pellets are hard and dark brown.
Rabbit meat is still one of my favourite.