Originally Posted by Darrin
Not it's not. Once their knees knit together you can ride them, shouldn't ride them hard but you can definitely ride them. Starting out with 10-15 minute rides isn't going to hurt them one bit.
I must respectfully disagree.
Generally speaking, riding a horse at two years is a bad idea. It's not just about the knees, it's about the back (a functional "suspension bridge") and that portion of the body can suffer minor injury that can cause problems later in life.
I commend to you the work of Dr. Deb Bennett in this area.
This does not mean "no work;" it just means "no saddle work."