I was watching the videos and I was thinking the same thing as MM I own a foal. And i'll say i'va taken him over a jump or too on the trails because we had to. And you gotta think. Horses arn't as fragile as we make them out to be. Even as foals they do so much running and jumping and rearing and all kinds of falling down and stuff. I think a jump every once and awhile isn't going to be bad. But if you were schooling them into a jumping horse that early then that's probably bad for the joints. But you gotta think out in the wild when they are running with the heard. I'm sure they jump streams and gully's and logs all the time. But of course out there horses don't live as long either. But that's just my 2 cents.
Baby, Sparta, Carmen, Henry, Hooch, Mercedes, Butterscotch