Thanks. I started asking hunters to give me the deer parts they would normally throw away but I told them I didn't want the bladder or intestines because I wasn't sure about them.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.