Diamond Pro89 Beef, Pork & Ancient Grains Formula for Adult Dogs 40lbs.Packed with protein and fortified with amino acids from energy dense sources, Diamond Pro89 Beef, Pork & Ancient Grains Formula for Adult Dogs gives performance dogs the nutrients they need to support hard work and endurance. And to help build and maintain muscles, 89% of the protein is from animal sources. Beef is the #1 ingredient to build and maintain strong muscles for endurance and performance 89% of the protein comes from animal sources, rich in