Happy to say you can learn from the best in a matter of moments in regard to training horses is somewhat naive and a gross exaggeration. Every horse is different in makeup , personality , etc. It takes years to build up knowledge on what to look for and apply certain methods to each individual horse, including nutrition, vet care , and so on.. Now because I have a son in law that trains horses I have first hand experience of the process and compared to the big stables (130 horses or so)where one size fits all because of staff/ time restraints , his horses are probably better looked after over all. An example of this is testing ph levels in the dung, which he does for gut health. Big stables dont have the time, that I know of, therefore take a one size fits all approach when making up feed. Only when the horse presents with a sluggish disposition do they then pick up on it, and adjust accordingly with additives in the feed. But once again it takes experience to recognise in a horse when something isn't right, and a lot of that comes back(hopefully) from the track riders.