Could my cat have done this to this rabbit or do I have a predator?

[Mskayladog]

Found a mid sized rabbit in the house this morning the back half was eaten up to the rib cage, the head and front legs was the only thing left. This was not a small baby rabbit.
My cat is fat fat fat and 9 years old I have seen him catch chipmunks and baby rabbits but never known him to eat one.
Could my cat have really killed and eaten the rabbit or did another predator kill it and he found the carcass. Taz is orange and white and there was no blood on him.
Oh and if not the cat what kind of predator would only eat the back half?

 

[zazouse]

My cats can and do catch and eat rabbits as well as squirrels all the time.
My calico cat caught a squirrel 2 days ago and ate all but the back legs and she did not have any blood on her so i bet your kitty is a great hunter