The problem with an untrained horse is, if the person who is keeping it just for enjoyment can't keep it anymore, what will happen to it? Most people don't want a horse just as a pet. So the poor horse is likely facing a very bad end. If it isn't left to starve in a field somewhere, it will probably end up at an auction sold to a killer buyer and spend a week on a cramped trailer heading to Mexico, with little food & water, and then face a terrifying, horrifying last few minutes waiting to be slaughtered, smelling & hearing other horses get slaughtered. So, I think untrained horses are a very bad idea. Even well-trained horses face iffy futures, especially in this economy. An untrained horse has almost no chance once it leaves the person who was caring for it.