Some of these performance enhancing drugs are actually good for the horse. But here's the problem--what happens when a trainer runs one cold for three races, drops the horse down, and then goes hot? What happens when a guy who bets has a 3/5 shot that he has been treating that runs in a superfecta race, or on a day with a big carryover?

On a more mundane level-- yeah, we all have a list of trainers we adjust for when a horse goes into or out of their barns. But what happens when a small barn (or a "straight", not so small one) switches to one of the supervets? Unless the vet is listed, the next couple of times you deal with that trainer you can't get it right.