After the tragedy that befell Eight Belles, the runner up in last week's Kentucky Derby, the trainer of the horse ordered drug testing as a part of the autopsy to dispel any notion that the horse was 'roided up.
Larry Jones, the trainer, "guaranteed" that there were never any steroids on the horse. Jones was responding to the criticism that the horse was so large.
I don't know if there is roid testing in horse racing. If there isn't testing, there should be. Just as Larry, you better be right in your guarantee or your backpedaling act will be more entertaining to watch than the Preakness.