The Eukanuba Dog Working and Endurance dog food has complete and balanced nutrition that is specially formulated to meet the needs active of adult working dogs. And with added calcium and other essential minerals, can assure that hard working dogs are getting the best support for their teeth and bones. High level of premium proteins can help maintain good muscle tone and improved muscle function essential for endurance. Glucosamine and Chondroitin have been added for joint health and support. Excellent dog food can help working dogs in achieve the highest level nutrition for optimum performance.