I have no feeling for cretins who would go and shoot up 15 horses for no reason. I think the same thing should happen to the perp, and then throw their utterly worthless carcass down the mine, into eternal oblivion. This is so disgusting, and there is absolutely no excuse anyone could offer which would suffice. Poor things.
This most likely took several people and , or, several days as the horses would have run at the first shot.