There are many other supplements available. But, my concern with these supplements is the lack of regulation of the product's ingredients. Ask you veterinarian about these treatments and not your neighborhood health food store or pet food chain. They do not have veterinary degrees and are usually getting information without doing the proper research. There are now a plethora of touted treatments for arthritis.
Some treatments claim to cure everything.
What works for one disease may not help another. The problem today is that we are being bombarded with these cures and remedies. It is important to ask your veterinarian about anything you give your pet. The veterinary profession is not self serving. We are truly here to help both you and your pet.