re: How long before the Kentucky Derby is protested?

The Tennessee Walker Horse Breeder and Exhibitor's Association has been under fire from the Humane Society for alleged "soring," inflicting cuts around the horse's hooves to produce a more higher, more pronounced step in competitions. It's a fact TWHBEA has had difficulty refuting, considering the charge has been verified by former association horse owners and trainers.

I'm surprised the Derby doesn't have some doping scandals. Maybe they have, but I'm not much of a race fan so I don't follow the sport closely.