Please help me to figure out what to do next, I’m at a loss and need some good advice. Here is a quick version of my horse’s history. At age 2, my WB/TB gelding hurt himself in the field - not sure when exactly, he did crash through a 3 board fence and it was around then that he first went lame. Off and on (and off and on and off and on) lame for the next 6 months at least, if not longer, with no good diagnosis from a variety of vets. Some vets are just dumb I think, no offense meant to the good ones 
He got much worse in April 2007 (very lame at walk), finally got a diagnosis that made sense - torn collateral ligament in the hoof, OR torn deep digital flexor tendon in the hoof. But no suggestions of how to proceed with treatment, only stories of all the horses he’s known with this injury who didn’t recover…
So I started him on stall rest in April. He showed significant improvement (sound at walk) by mid may, but then he escaped and ran around and went lame again. Started stall rest over again on May 25, 2007. Started handwalking 5-10 minutes a day on December 10 (at 6 1/2 months stall rest). Started him on ace powder 2xday at this point because he was starting to spaz out. With how much he was being crazy in his stall, he made his leg puffy again and before I knew it, he was a little off at the trot again. I quit handwalking him as it seemed to only excite him more to get out, and started letting him into a 17 x 24 area for a few hours a day about a month ago, and have been recently letting him out in there all night.
He is now lame at the walk again, 8 months after we started stall rest, and probably a year and half or so since the original injury.
What are my options now? Stall rest/small enclosures don’t seem to be working. He’s too hyped up. I can try resurpine, although it scares me to death to give him something like that. I have the option of moving him one mile down the road and turning him out in a big flat field. I don’t know if that is going to help him, since when it first happened he was out 24/7 and that was when he would get better, worse, better, worse. Also, I know it will be scary for him and he’d probably have to be super tranq’d for the first few days there - he was born at my old farm and has only been moved once to come to my new farm.
Any suggestions? 