[fun w son]

found the rabbit on the ground under the cage that is about 4-5 feet off the ground. hole in the wire part of the cage was about 1 foot around. the weird part is the rabbit's eyes were both hanging out and a little blood around the mouth, other that that, no other bite marks or wounds?? any idea what would kill the rabbit but just leave it there??
there are no dogs around and we live in a subdivision so no woods for about a mile??