Jason Theodosakis MD, .MS, MPH co-author of "The Arthritis Cure" says, "There is an extensive body of clinical research - decades worth - proving that glucosamine and chondroitin sulfate work in both humans and animals." Applications include use for arthritic inflammation, arthritic joint pain, rebuilding damaged cartilage and rebuilding synovial fluid that is the natural "cushioning agent" between joints that stops bones from rubbing or grinding. Let your dog try Darford Super Premium Dog Biscuits, baked fresh with natural preservatives and antioxidant support.