Saddle him when he is a yearling? They need to be babies. A late 2 year old, ground work, over time depending on maturity, training will progress into riding. Every horse is different, ease into it. I prefer mine to be started at three and be consistantly worked with by one person/s who have the same riding/training skills until they're 5. To me an older non trained horse's mind can impede training and pose issues, some which may never be resolved.