There is no nutritional reason not to feed anything that is part of an animal. Your dog may or may not eat bladder, intestines or stomach particularly of a deer. Feed the whole squirrel fur and all. Same with rabbits. Let the dog decide what he wants or doesn't want.
My dogs don't eat intestines of a rabbit. My cats do. They will all eat the whole squirrel. I have never fed deer intestines, bladder or stomach.
My dogs don't eat intestines of a rabbit. My cats do. They will all eat the whole squirrel. I have never fed deer intestines, bladder or stomach.