I've heard lots of good things about it. Someone who used to be on the board but no longer posts uses it for her chocolate lab who had multiple ortho surgeries at a young age. She started using it right after those surgeries I believe, the dog has been on it for years and it is a wonder drug for her. My dog is seven, I know he has mild hip dysplasia and I will probably be using it for him in a couple years. I've always heard positive things about it.