Lewis was seen by John Ferguson, a specialist in developmental orthopaedic problems yesterday. Mr Ferguson thought he had OCD of the shoulders rather than Wobblers, and pointed out a couple of things that I found interesting.
Although Lewis' hind movement looks shaky and stilted, his hindquarters and thighs are much better muscled than his shoulders. Mr Ferguson thought the hind movement is abnormal because Lewis is having pain in his shoulders, and so is keeping his hind legs as well under his body as he can to relieve the strain on his forelimbs.
Mr Ferguson was able to reproduce the delayed hind proprioceptive reflexes that made my own vet think the problem was wobblers, but as soon as he destabilised Lewis by getting him to look round at me, the reflexes immediately became brisk. Apparently the way Lewis has been standing 'over his legs' in order to save his shoulders is a very stable position on four legs - or three - as long as he stays completely still. Therefore he doesn't mind having a hind foot placed upside down, and will leave it in that position because the nice vet seems to want it that way. But if he moves at all, even to turn his head around, he becomes unstable and corrects the hind foot instantly.
As we live more than 100 miles away, Lewis was kept in over night and apparently made himself so popular with the vet nurse on duty that he spent the night with her in the on-call flat above the hospital rather than in a kennel with the 'ordinary' - ie non-wolfhound :-) - dogs. No doubt he thought that no more than his due

.
He had X-Rays, contrast radiography and arthroscopy today, and he does indeed have grade 3 OCD of both humeral heads, the right being worse. His neck is completely normal, as are his elbows.
He is having surgery to his right shoulder on Thursday, and all being well we will get him home on Friday. He may need surgery to his left shoulder in 6 - 8 weeks, but Mr Ferguson says that once one shoulder is corrected, that often relieves the strain on the other enough to allow it to heal without intervention.
So Lewis' show career is over before it begins, but I couldn't care less :D. I'm just grateful that he has something that can be treated successfully, and that he has a very good prognosis.
Thanks again to those who replied to my cry for help when I thought it was Wobblers.
Sharon