Oven-Baked Tradition Tuna with Glucosamine & Chondroitin Fillets for dogs are grain-free and prepared with fresh tuna. Glucosamine and chondroitin contribute to the hydration of the cartilage to protect joints. These fresh & authentic fillets have a limited number of ingredients - perfect for dogs with food sensitivities. With only 17 calories, they're low in fat and contain no trans-fat for better health. The perfect reward!