Ok not really a killer but he thinks he is. Couple of days ago I was at home sleeping during the day because I work nights while my wife was in the kitchen making a bottle for our newborn son. My son was in his playpen in the living room with my 85 pound white male boxer dog. My wife heard the dog bark and then go nuts jumping and barking at the door so she went to investigate and saw a man getting of the porch and heading to his truck. The front door was open and the glass storm door was unlocked. I later found out that he was selling steaks out of his truck. Although my dog has never bit anybody would probably have licked him to death it is nice knowing that he will display some sort of aggression to make people reconsider sticking around.