I agree with Spyder. I am working with a horse right now that did this one direction. Ten billion times around the circle I was making, I'd apply my outside rein, out side leg, and bring my inside hand straight up. If you put your inside had out and away, he can still barge his shoulder to the outside, so raising your hand straight towards the sky will better communicate with his hind end and his shoulders. When I applied these aids, if he does not look to go in the direction suggested, I kick with the outside or even tap him with my stick. The moment he goes there, I release everything, walk a few steps, then do it again. This horse only does that in one corner, but I would do these transitions all the way around the circle.
Be aware of what your body is doing. Do you have an awareness on your inside seat bone? Is your body turning in the direction you're wanting to go, or is your body saying one things and your reins another?
Do this at the walk until you feel its gotten easy at the walk, then trot the trot doing the same thing. Just remember, if its there in the walk, it'll be there more in the trot, and even more in the canter. So If you can erase it from happening from the walk, the trot will be easier. If you can't get it at the walk, don't even try a trot or you'll be setting your horse up to be a loser. And you want him to be the winner so you can continue on and progress. :)
Another exersize that will help fix this issue is alot of shoulder-in. Do shoulder-in until you can do it in your sleep. What it will do is give you more control of his outside shoulder, yes, but it will also help him connect all his parts. Horses who get broken like this, its because they have parts of their body that don't connect, and it's usually the front to back that is disconnected. Shoulder-in will help your guy become even not only in your reins, but through your legs and his entire body, so that eventually he can learn that his body follows his head.
Good luck. Be patient. :)
In riding, a horse's energy is like a river- guided by the banks but not stopped by them.
Last edited by koomy56; 04-14-2009 at 10:49 AM.