Agree with Darrin. His front feet are too upright to be 'natural' for him and his conformation. The gaited horse books say that the proper angle is around 50-52 degrees; my farrier trims according to the horse so we're not measuring angles, per se. But your horse can't extend his front legs and get the 'reach' he needs with that trim. As a result, he'll be out of sync with his back feet. Also agree with Darrin about squaring off the back hooves a bit, that will help as well. Use bell boots or some other protective boots while he's trimmed like this, to keep him from hurting his front feet.
I would also add that the easiest way to get a gaited horse to learn to canter is not in an arena where they have to do the corners and figure out the leads; it's out on a straight trail, maybe a slight uphill, just like they would do in the pasture. Ask for speed and let them figure out the lead they want the first time.
Last edited by Ladytrails; 03-25-2012 at 12:24 PM.