Fleetwood had an OCD injury in his shoulder that took forever to diagnose. Now, the weird thing with him, was that by the time it was diagnosed properly, he was too sick with autoimmune disease to have it treated. But when he got better, it stopped bothering him. Seriously, it hasn't bothered him in over a year, so I'm wondering if he grew out of it. I haven't had him x-rayed again.
But my vet specializes in stem cell therapy, and the treatment option for him was called "platelet rich plasma" treatment, and the quote was about $350, no surgery, hardly any recovery time. Look into it!