Dunno about that. All horses are domesticated animals. Those living 'wild' are feral, essentially strays. It's very romantic, but they're basically just better equipped to survive without owners than are dogs or cats, and cause less trouble, so they've slipped through the cracks where, say, packs of Great Danes would not. It's interesting though - I was reading something about the PMU foals, who aren't wild horses but live somewhat similarly and they said that the foals were in many ways much easier to deal with than traditionally raised horses, since growing up with the herd gave them additional social skills with other horses.
darkchild.., he is pretty. What I know about horse anatomy could fit into a thimble, but he's got a nice shoulder.