Does anyone have any experience or know of anyone with experience with surgical options for dysplastic dogs competing in Flyball?

I have a German Shepherd mix, between 45-50 lbs, who has hip dysplasia in both hips. On his right side, the ball and socket are not in place and separated, meaning that he has no real hip joint, but there isn't any pain. On the left side, however, the ball and socket are misaligned and grind bone against bone when in use. He has been competing in Flyball for 5 years. He was diagnosed three years ago with dysplasia. Until this last weekend's tournament, he has been doing well in the game. However, he was slowing down. Last weekend, he actually came to a dead halt in the lane after hitting the box numerous times, in pain, we believe. He ran over a second slower than normal and has begun tossing his rear legs in the air as he jumps, instead of pushing off with them or tucking them under - which he used to do. He has begun to use his shoulders more to accelerate and jump, instead of his rear end. He is currently on Joint Strong as a daily supplement and aspirin at tournaments. Curtis is in great shape. He is lean and trim. He has managed to keep quite a bit of muscling over his hips because apparently walking, short sprints, wrestling, and chasing other dogs doesn't hurt him. It seems that turning on the box causes the most pain. We visit a chiropractor/acupuncturist monthly to keep him as comfortable as possible and realign his joints and spine as neccessary.

I am now looking into other methods of relieving his pain so he can continue playing the game he loves so much. If I have to retire him, I will. I've done some basic research into the femoral head ostectomy (FHO) surgery. Curtis may be too large for it to work, but at least (from what I've gleaned) it would relieve the pain associated with the bones grinding.

I'd like to hear stories of dogs who have had a FHO surgery, recovered, and returned to Flyball. Or, perhaps other options to help him out.

Thanks.

Is he on a joint supplement? How long has he been on it if he is?
I have a border collie that had an FHO plus another fracture repaired when she was 3 months old, she is now competing in Splash Dogs. She is training for flyball and doing great.
I work as a vet tech and when I was in surgery with the dr. he told me that she would never be a performance dog.
She is on a great supplement, we have done physical therapy and massage. Have you tried any of those, maybe chiropractic,acupuncture? I have seen some great results with all of these techniques with hip displaysia.
My rottie that I had about 5 years ago, did chiropractic for her displaysia and spondylosis she lived to be 11. She died because of cancer, but other than she was great, she would run and have fun. We did that about every 2-3 weeks.
Hopefully that helps. Let me know if there is any other questions you have.

I have a team mate who has an 8.5 yr old Border Collie who's hips are square heads in round sockets. River had a Pectoneal Resection done about 5.5 years ago, then last year had a denerving done. This is a dog who lives to play Flyball. He recovered well from both surgeries but his fur Mom has since decided that it's in his best interest he retires from active all weekend running. An FHO is his last option but with the cost of that procedure she is opting for retirement.