I have a lab about 2 years old. He will play fetch all day long and retrieve dummy's no problem. I have even put a goose wing on the dummy and he has no problem with that. But in the Field he will not pick up birds. He marks them great but when he gets there he will smell and bite a little but not pickup. How do i break this problem? A little more info we have free range chicks and hes be thought to leave them alone is this my problem?