Hey guys. I have a paint gelding that I ride English and jump with. We don't compete a whole lot, but I'd like to start. However, a judge told me that in order to place better, he would have to have a "flat neckline." Sort of like how the horse holds its head level in this video:
So, my question is: How would I train my horse to do this? A standing martingale, perhaps? I know you never jump horses in those; I'm just curious as to what would help him keep his neck level during flat work.