We had one who started attacking me, the it progressed to the kids, then the hubby and even the in laws when they came to visit. He would chase the kids on their 4 wheeler clear around the yard. I couldn't turn my back he would sneek up on me. He would act like he wasn't doing anything when I would look then run toward me when I turned, we did this over and over one day. I look he pecked the ground, I turn away he would run toward me. Needless to say he is no longer with us. I agree you did the right thing. He mayhave hurt someone badly at something. And that would make you feel worse than shooting him.