I have four dogs (labs and a Golden) and many chickens. We had that problem in the beginning and my husband trained them to stay away from the chickens. He put the chickens in their mouth forcibly and then spanked them. Neither the chicken or the dogs had any lasting harm done. They now all eat side by side and we havent had any problems since then. Of course, we still do not leave the dogs unsupervised with the chickens except for one lab who now sleeps in the coop with the chickens and guards for predators. The dogs decided that they much preferred chasing oppossums to chickens. BTW my chickens are VERY domesticated. We let them roam outside in the yard during the day and they "knock" at the door when they want more attention.