Pit Bulls are not usually prey driven/agressive. They are also very easy to train. My brother's Bull Terrier (Spuds Makenzie dog) wouldn't hurt a fly. Once my geese chased him and my sister in law and were biting the dog on his butt and sides, and all he did was look back at them like they were crazy. It's a good thing he has such a nice temperment. He's so strong he could kill them by accident. My Dachshund can't be trusted around small animals. Rather than fight her hunting ability, I keep her away from the birds and am getting her into earthdog competitions.