He was actually REALLY good once the farrier got his hoof up and picked it up with no resistance at all when asked. It was the farrier approaching him that caused the problems. I got there a wee bit later than I had wanted to (and the farrier was early lol) and my friend tried to halter Aires and bring the farrier into his stall so that the farrier could do his feet in the stall (somewhere that Aires was comfortable). Apparently right before I got there, the farrier tried to go in the stall and Aires actually reared up and almost hit his head on his shade.
My friend brought over some of her apple/carrot treats (which Aires loves), and they helped distract him from the farrier, but I don't like giving Aires treats like that because he's lippy anyway and he gets VERY pushy if you give him treats.
I've had just about every man at the stable try to approach Aires and he completely freaks out (even with me standing there trying to keep him calm) any time one of them approaches him. I seriously don't know what his deal is. He has NEVER been abused or anything.
However, that's all beside the point. Lol I'm going to ask the BO today if he really does require every horse to be shod in order to go up the mountain.