Good thread. As the OP, I appreciate everyone's responses.
Just to reiterate a point:
- I had no idea about this dog's existence before the incident; only the nature of the white trash neighbors. I'd believe -- reasonably -- that they wouldn't have raised this dog appropriately.
- I was an animal rights vegetarian for four years. I'm not an animal hater by any means. So, no, I'm not out to shoot anything that moves.
- My primary concern was for my kids, pregnant wife, and the children of my neighbors.
While ultimately the right decision was made, unfortunately it was only due to me not having my firearm on me. Had I had it, I have no doubt I would have put that dog down.