Dog hip & joint supplements are dietary products formulated to support joint health, reduce inflammation and pain, and slow the progression of degenerative joint disease in dogs—especially useful for aging pets and breeds prone to hip dysplasia or osteoarthritis. Common ingredients include glucosamine and chondroitin (building blocks for cartilage), methylsulfonylmethane (MSM, an anti-inflammatory sulfur compound), omega-3 fatty acids from fish oil (which reduce inflammation), hyaluronic acid and collagen (for joint lubrication and connective tissue support), and botanicals such as turmeric/curcumin. Some supplements are available as chews, tablets, powders or liquids; others combine multiple ingredients to target different aspects of joint health. Clinical evidence varies by ingredient: glucosamine/chondroitin and omega-3s have the most research supporting modest benefits, while other components may help but often need more robust trials.