Stupid dog owners for letting their (hunting breed) dog roam. And since when is someone "trigger happy" to target practice in their back yard? If there isn't an ordinance against it, he's within his rights. I target practice in my own back yard. I'm not "trigger happy". I just want to have a half a$$ chance of hitting what I'm aiming at and not some accidental object/person/animal.
Like someone else said, the dog ignored the shouts and the warning shot. It seemed pretty determined. Sorry, but the owners of the dog is at fault here.