Hey Polar Bear,
So glad you found workable solutions for your poochie.
I just wanted to jump in, because I just rescued a 3 year old doggy and found out he had HD... My vet was really not very helpful, I had to muddle my way through the internet to find treatment options. I have been doing the GSM supplements as well, but what I found was a human chiropractor who also treats dogs and horses. My pup has gone for going on two months and it is really making a difference. He goes for adjustments every two weeks now and we are working up to monthly. Might be too far for you, but therre might be one nearer to you , anyways, it's Dr. Fleet in downtown Oakville. I highly recommend him. If you or anyone goes, tell him that Dewey sent you!