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One of those previous ambiguous threads was likely mine, because I had the same question after a loose pit bull was shot and killed about 200 feet from my back porch earlier this year.

By the luck of the draw, the shooter in that case was a LEO who happened to be driving by and saw a screaming woman and an attacking dog. I think the take-away from that case is that it helps your defense to prosecution if you happen to have a terrified witness who can attest to the reasonableness of the shooting. It also doesn't hurt to be a LEO.

https://www.galvnews.com/news/free/arti ... d108a.html

Remarkably, shortly after that event transpired, there were several more dog attacks in our subdivision. If I'm jogging I rarely carry (too heavy), but I never leave the house without a large knife strapped to my leg.