He doesnt attack them because he wants to kill them and eat them. When he is running and they start to run he chases them. He is a boxer from our first litter of puppies. I really dont want to find him a home!! We live on 9 acres, my chickens are completely free range. So are my dogs, they are inside dogs but go out during the day to do their business and such. I am going to hook up one of those running lines from my porch to a tree in our yard so that when I let him out he will be tied. The chickens know better than to just walk around him, I hope. If this doesnt work then he will be going.
dead chicken around neck...maybe works for some dogs. My in-laws tried that. Eventually, when the dead chicken was removed, the dog immediately went and killed another.