Originally Posted by chasin the dream
ok so I got cought up in everything else you said and forgot about the leg pressure problem. I am suggesting spurs. Not necessarily sharp ones but something to give more meaning to what you want to do. I guess I could put it that way. :) Yes, spurs can hurt a horse and will if used the wrong way. However, all you are using them for is to make what your asking more clear. Don't go jabbing him but squeeze and I believe that he will move off your leg.
Spurs should not be used to make or teach a horse go forward. They should be used as an aid refinement
on a horse that already
knows how to go forward.
To me, this definitely sounds like a physical affliction that the horse has. Generally, horses should at least have some
semblance of balance on each side if they are schooling even one direction well, unless there is a soundness issue.
Before you do anything else with him, as others mentioned, get the whole report on his health and soundness from professionals, or even a well respected trainer.
Perhaps you could show us conformation shots from all angles; seeing the way he is built and muscled may also provide some answers. A video may help too.
Out of curiousity, does he usually carry his tail/head/ribcage to one side? If you free lunge him, does he usually pick his comfortable direction if he has the chance?
If it isn't a soundness issue, then lots of in-hand work is one of my biggest suggestions. Flexions, pressure exercises, stretches, longe-lining and lunging are just some of the ways you can help develop balance, muscle, flexibility, and understanding without the added stress of having a rider on his back. If he responds nicely to these exercises, then try adding a rider while lunging, etcetera.
Time, patience, and understanding: the keys to unlocking potential in horses.