I wholeheartedly agree w/ Ramsey on this. At this young age, the horse is neither physically or mentally mature. Pushing a horse at this age can cause a multitude of problems from oversized/overstressed joints (which can lead to OCD), souring against riding/work, etc. In my opinion, I think anything under 2 is too young to be saddling or climbing on. I come mainly from a background of cow horses and performance horses and have seen many a horse ruined by being pushed too hard, too fast. I could show you research data on overfeeding and overexercising that would blow your mind. I've walked through clients'/prospects' stables and seen 8 year olds retired from the show ring from blown out knees, and blown minds. I know numerous folks on the training/showing end that make horses their business and some of the most respected ones (in my eyes and in others) won't get on a horse until they're at least 2 - 2 1/2 and then are only backing them, then really start to ask a lot of the horse in their 3 year old year. Everyone has a different opinion on the subject, I just opt for the opinion that keeps my horse the healthiest and happiest. As an aside, I have worked with many Doc O Lena bred horses and they tend to mature later than some of the other bloodlines.