Purina Pro Plan Development Beef & Rice Formula High Protein Large Breed Dry Puppy Food, 18-lb bag; Help make sure your puppy has the nourishment he needs to grow into a big dawg with Purina Pro Plan Development Beef & Rice Formula With Probiotics High Protein Large Breed Dry Puppy Food. Beef is the main ingredient in this kibble, which is specially formulated for puppies who will weigh over 50 pounds when they grow up. This recipe also contains omega-6 fatty acids and vitamin A to support skin and coat health. It features glucosamine to support joint health, and calcium, phosphorus, and minerals to help his teeth and bones grow to be strong. Plus, this kibble is made with live probiotics to support digestive and immune health, and it is free of artificial colors and flavors. Chews wisely!