Honestly... Out hunting most horses love it so much they utterly forget their manners. Take my mum's horse.. She goes hunting every season, and her horse Percy is PERFECT. I mean out and out bombproof. Out hunting though, he's a different story entirely, because he likes it so much. Here in Ireland, its extremely rare for a horse to not turn into a total nutter. Really, if a horse is perfect every where else, I'm inclined to leave it. The connies are strong little brats, and love hunting especially. If I were you, I would hold on tight, and hope for the best. He will pull up when the others do.