To me, horse racing is pointless for the very reason the horse was killed, there are any number of ways to gamble. What we see with horse racing is no more acceptable than 2 dogs fighting in Michael Vick's former business. Imagine putting down a human being that way after losing an Olympic relay or any other foot race ?

Why not just bet on NASCAR just the same ? The loser's in those races that are damaged, they send to the garage and they repair & replace the broken parts.