Just saw this thread.
When I was 11 or 12, my folks would always warn me about "the dogs" when I went outside. In my neighborhood, there were about 5 or 6 dogs that, when their respective owners would by chance let them all out at the same times, would group up into a pack and literally go hunting together. Each dog was a good, approachable dog when it was alone, but when they were all together, they tapped their "wild" veins and went around like hungry wolves.
A few cats were killed, as well as one neighbor's small puppy. The cops and Animal Control could never do anything because they were never there when all the dogs were together. They'd show up a few hours later, when the hunt was over and the group was separated, and the owners would say, "look at how gentle my dog is; he'd never hurt ANYthing." And indeed his dog WAS docile and submissive to the cops because he wasn't with rest of the pack at the time. Thus, nothing was done about it. Until.........
I was out playing with Star Wars guys with a friend and we saw the pack run by, barking and howling. I still remember how wild and aggressive they all looked. Little kids would honestly climb trees and hide in garbage cans to get out of the way. We knew better than to follow them although we wanted to see the path of blood and cat guts they would leave behind them. They went down the way and stopped. We couldn't see them, but knew they had stopped because the barking wasn't fading any and was very feverish. Next we heard, "POP! POP! POP! POP! POP! POP! POP! POP!" Probably 12 or 15 shots were fired, followed by numerous squeals and howls. Well, danger be damned, that was too much action for us to resist. We went down the street and saw a huge PILE of dead and dying dogs in this one guys lawn and out in the street. He said that they had come at him when he was out in his yard, so he ran inside and shot them all through the screen door with a .22 rifle.
Naturally the cops were there as well as the entire neighborhood. I remember most of the people saying that they were happy it had happened, but of course some people were bemoaning the loss of their pets and were insanely angry with the guy. I don't think the guy was charged with anything, and the neighborhood was a lot quieter and, oddly enough, more boring afterwards.
It was even on the news later that week!