I got on here tonight looking for advice - my 4 month old Boxer puppy has attacked one of my chickens for the second time in a month. The puppy is a male AKC half German Boxer/Half American Boxer. We have had Boxers for nearly 12 years but this is the first Boxer PUPPY we've had since we've had chickens. Our two older Boxers are going on 11 years old and our female expressed a keen interest in them for about the first week (she has a very strong prey instinct even for an old girl but after the first week she doesn't pay them any attention. The first time the pup attacked this chicken, I found her just sitting in the yard when I got home. He had chewed on her back end but I got her doctored up and all was well. Kept a real close eye on the pup ever since. I really thought he was getting better. Then this evening we go out to put them in the coop and as I walk out on the deck, I see him with this same chicken down in the yard. I immediately hollered at him but he didn't even move until I started running down the steps towards him. She got chewed up pretty good on the legs and on the side of her head. After the first incident, I called to talk to the vet about it and he said the pup was probably "playing" with her. Said the pup could have killed her if he wanted but since he didn't it was likely he was playing with the chicken. Our Boxers are house dogs and have a dog door. We have about a half acre fenced yard where the dogs and the chickens have run of the yard all day. Short of isolating one of them, I'm not sure what to do. The one that was attacked and one other hen are smaller than the other four. The other four are already laying but these two are not. We put them up in the coop at night. Does anyone have Boxers AND chickens and advice on how they can peacefully coexist in one yard?