Is this a young horse as well as green? Are you schooling over low fences (3 feet and under)? Perhaps something as simple as using an automatic release / following release will help them jump a little rounder. Here is my 4 yo jumping 2’3" the other day.
Just the act of maintaining a connection with his mouth has helped him to be a little rounder over the fence. This picture is a little late in the bascule, but you can see he’s given it a very good effort. If I ride him with a crest release at this stage in the game he just falls apart, he really prefers the consistent contact.
I have a horse who likes to jump over his shoulder on low jumps and verticals of any heigh, the reason is that he likes to get very close to the jumps. If we place a ground line at the base of the jump and roll it out a ways, like 2 or 3 feet, it really encourages him to leave earlier so he can have a better bascule to his jump. The other problem is that he’s just freakishly talented and knows he doesn’t really have to try very hard. Case in point… Dodger jumping out of the Paddock
If you pause it at 17 seconds when he is at the apex of the jump, his front end is not very desirable and in general this is how he gets it done, except, when it’s an oxer…
at a show
and at home
I think he’s just got an unusual style, and that’s cool with me, because he is very careful, in general. I think you can teach a horse a lot of things using gymnastics but I don’t think you can fundamentally change how they jump naturally. They can either jerk their knees up to their eyeballs, or they can’t. But a big heart and great hind end can make up for poor front end, unless of course it’s the hunters… 