My dog, a ten year old puggle who I've had for about four years, killed a friend's chicken before either of us knew what was happening. It was SO fast. That was about three years ago, and this spring I started hatching chickens. I assumed I'd have to keep him far, far away from the chickens, but instead he appointed himself Protector of The Flock. I was surprised to say the least, but I still wouldn't trust him without supervision.