I have a 10 year old, 18h Hanoverian gelding who about 5 months ago became lame. We do hunter/jumper and regularly jump up 3 ft. He gets walked out every time and lineament too. But he just became off one day, on the front left leg. We put him on stall rest for a few weeks and he got no better. So our vet came out and blocked him everywhere in that leg, from shoulder to hoof and he couldnt get him to block clean. So we took my horse to a university where they gave him a bone scan that showed some heat in the injured leg. We gave him an HLA shot to get the fluid back in the joints and gave him time to heal; with limited drugged turnout and hand walking only. But after a few weeks there was no improvement. So we blocked different areas of the leg again, only to find when we blocked the inferior check ligament he was sound. SO we gave him a treatment similar to the IRAP procedure and waited while he recovered. Its been about a month and a half now and he is still off, worse than before. Same leg, same everything. And now, we can't get him to block clean at all. He's been xrayed, ultrasounded, you name it. We can't get an MRI without knowing exactly where he's hurt. Which we don't know. My vet along with the university vets are completely confused, and don't know what could be wrong with him. He's on Smartpack, with a daily wormer, glucosamine, and RecoveryEQ. He also gets Adequan injections for the arthritis. He's only 10, and there's no history of sudden lameness in his family. I'm running out of ideas and so are my vets.