My gelding has a problem that we can't figure out. When I ride, he's great on the flat, but when we start jumping he goes crazy. After a jump he starts bucking and galloping out of control. Today he bucked me off for the second lesson in a row. After that, a very experienced lady at my barn got on him and he tried to buck her off too, and she was just trotting him. It's just not him, and it has just started in the last month or so.
I've decided not to ride him until we get this figured out, because something's obviously hurting him. My trainer's calling the vet out tomorrow, but does anyone have an idea of what could be causing this? Thank you so much.