I think most people will say no. I say maybe. Only because of personal experience. I think the type of dog matters, ands it's willingness to listen to you. Prevention is also a factor. My dachshund was a chicken killer from the start. There was zero training her out of it, but she was bred to hunt small game so she has a high prey drive. Putting up a plank of wood she could jump over to get into the coop, but the hens could, helped safe guard them. My neighbors dog got one of mine. But i didnt realize it was him. Second time i caught him, gave him a firm swat and "no". Plus sending him home. After that i added wire mesh to lower the opening of the coop so hens could get in but dog couldn't. Since then they have been safe. I haven't see. Him attempt to chase them and he has been around a lot. For what its worth, he is a herding/working dog. And my herding/working dog, a malamute, has so little interest in them that if one is slaughtered by a hawk or coyote, i can toss the carcass to him. - thats just my personal experience.