The ONLY breed of horse that is allowed to race in the Kentucky Derby is the Thoroughbred.
The Kentucky Derby is a race for Thoroughbred horses.
There is only one breed of horse allowed into the Kentucky Derby, and that is the Thoroughbred.
The first year that a woman entered a horse in the Kentucky Derby was 1904. Her name was Laska Durnell. Her horse, Elwood, won the Derby that year.
Equus caballus. The breed is the Thoroughbred.
No. Only three year old thoroughbreds can enter the derby, so they can only enter once.
Only Thoroughbreds have won the Kentucky Derby because the race is only open to registered Thoroughbreds, age 3.
Three years is the only age that's allowed for a horse to enter the Kentucky Derby. It doesn't matter within that year how close the horse is to having turned three. It likewise doesn't matter how close the horse is to turning four.
The Kentucky Derby
A horse named Super Saver won the 2010 Kentucky Derby!