Harry I trained Police K-9s for a livin, and there's nothing harder chargin, or harder headed than a Belgian Malinois, or dumber than any bulldog, so your dog has got to be somewhere in between. I would turn the collar all the way up, just to let him know your serious. If he takes a step toward a chicken, light'em up, and I would take him with me, every time you feed the chickens.