"He beat nothing"

[Riot]

So you think it makes sense to run an immature 2 yr old who can't break out of a gate straight just to build strong bones?

Heck no. But, if he can handle training, work in training, do it to the extent he safely can. The point is that young growing bones are malleable to stress and strain. It's the perfect time to build strong racehorse bone. Young growing horses that don't undergo any challenge to build strong bones don't. And later on in their careers, they break down more often than those that were worked.