My puppy is a four month old GSD mastiff mix. We have been training him to be around chickens. When he gets too close or too playful, he is reprimanded and listens. Our other dog is perfect around chickens and I trust him 100%. The puppy has been doing very good and I will let him out for periods of time on his own. 20-40 minutes. I will call him and make sure he is close. I never thought he would kill a chicken, stupid me. I let him out 20 mins before my boyfriend got home. I go to greet my bf at the door, and hes yelling at the dog who has a dead chicken at its feet. We discipline him and he runs back to the chicken to chew on it, as if playing. I got pretty mad and held him on the ground, scolded him and gave him a smack. When bf picks up the bird by the feet, its head, breast, insides have been eaten. ALl that is left is the legs and part of the butt and back. My boyfriend refuses to think it was the puppy he thinks the dog found the carcass and iwas playing with it. I think the puppy did it and we need to be much more careful. He does not think the puppy could have eaten that much of the bird. He could have killed it earlier in the day and came back for it, I don't know. What do you all think? We have never had a predator problem in the 10 months we have been here. And especially never during the daylight hours. The puppy WAS barking at something around 5pm, but I could not see anything. It could have been a squirrel, who knows.