I think (not having had the problem) that OCD is DXed with xray. This may be some useful information on lameness in large breed pups. http://www.greatdanelady.com/articles/guide_to_recognizing_bone_diseases.htmWe were told to rest him for a week but did 10 days to give him a little extra. I never thought of the possibility of Lyme, he also gets the flea & tick guard, but we have tons of ticks in our area. I will have to give him a good look over.
Doctor did not do X-rays as he could not find a pain trigger point and the puppy wasn't limping the day he went in. He did check for Pano by pushing along the long bone and he said a few other common genetic issues, but I don't know about OCD.