Just an update on the situation: The neighbor is fine. His lip and hand are a little swollen but other than that he is fine. I have fixed the windows so that noone can stick their hands in anymore and/or Duncan can't stick his head out! I still feel that it was ny neighbor's fault for sticking his body parts through the door but the windows definitely needed to get fixed. What if a child wandered up to the door and tried to pet the dog through the opening? Perhaps Duncan will still be "innocent" in the eyes of the law but I wouldn't want anyone to get hurt. He's wonderful once we open the door to people but he's doing his job protecting his family and we should help him out by putting in window panes!! ( My roommate broke them!) So anyway, done deal, everything is peachy keen. Thanks for all the advice and help. It certainly eased my mind to talk to others who understood my situation. THANKS!!