My old yard dogs killed the first group of about 20 chickens when we got them a while back. My son fussed at them, and they haven't bothered any more. We free range during the day, and the dogs are out there with with by themselves and haven't had any incidences. I realize that it could happen, but they seem great now with the chickens and turkeys and our housedogs do too. They definitely keep away the predators. We had been letting the yard dogs stay in the house because of their age and arthritis, especially at night. But we after losing 3 chickens to a fox and almost losing another in broad daylight with us sitting right there watching it, we called them back into duty. We just got a LGD pup to replace them so they can retire with dignity.