Actually, id say they are very tough. Raising rabbits for many years now. I have seen some things that would shock and awe...I wont go into details as most here couldn't handle it.. As for the cage wires , nope.. It was coons or rats in his barn. He had well over 500 rabbits at that time.. only 3 had their feet chewed almost right to the bone. Wire wounds are quite different. After looking at that picture again I still say that wound is old..No bood on the fur and the meat is dried out where exposed..He will survive just fine..If prey doesn't eat him that is....