The hock is often injected for pain and inflammation but rarely addressed as to why the hock is problematic. Sure they will tell you it is arthritic or stressed but WHY?
Is it the shoes, Is it a low back and pelvic movement problem giving rise to repetitive wear and tear on the hock, Is it a lower cervical [neck problem] causing compensation in the hock? These are all biomechanical problems that your standard Equine Vet will not address. It is not about the pain but the cause of the pain. Board Certified Animal Chiropractors will address the biomechanics and thus fix the problem.
Call me at 781-337-1180 or email me at Indekchiropractic@gmail.com with questions. I also write for Centered Riding "Stall Calls with Dr Bruce"