ive never known it cause any problems. some dogs will just run the length of the field with the rabbit they catch because its just the way they are.( some learn to retrieve others just wont have it.) i always skin my rabbits then boil them for 5-10 minutes before i feed them the dog. i brought in a dog that would always take the first rabbit he caught to the other end of the field and eat its head, then he would be o.k for the rest of the night.