Mustangs
Although Justify didn't make his first race start until he was 3, he trained as a 2-year-old. And, research suggests that training the horse’s skeleton to race speeds at the age of two may lead to less injury than starting as an older horse. | Photo: Adam Mooshian/NYRA

Q. I know it’s common practice to start Thoroughbreds racing at 2. But Justify didn’t make his first start until he was 3 and won the Triple Crown. Does this mean we shouldn’t start racing horses until they’re older?

Tina, via e-mail

A. There are many factors which influence when a horse is started in training. These include date of birth, degree of skeletal maturity, athletic ability, as well as the preferences of the owner or trainer

Create a free account with TheHorse.com to view this content.

TheHorse.com is home to thousands of free articles about horse health care. In order to access some of our exclusive free content, you must be signed into TheHorse.com.

Start your free account today!

Already have an account?
and continue reading.