Cosequin DS Capsules contain glucosamine hydrochloride and sodium chondroitin sulfate and have been scientifically formulated to help support the health of your dog’s joints. The ingredients in Cosequin work together to help support healthy cartilage. Cosequin joint health supplements are brought to you by Nutramax Laboratories Veterinary Sciences, the #1 veterinarian recommended supplement company. Source: Among retail brands. Survey conducted among small animal veterinarians who recommended oral joint health supplements. *Source: Survey conducted among small animal veterinarians who recommended animal supplements.