Purina Pro Plan Large Breed for Adult Dogs Chicken Rice Support your large breed dog s specific nutritional needs with Purina Pro Plan Brand Dog Food Large Breed Chicken and Rice Formula adult dry dog food. Real chicken is the first ingredient in this large dog food to help provide protein an essential nutritional building block within your dog s body. This highly digestible adult dog food formula is crafted to support optimal nutrient absorption and promote nutrient bioavailability. With 26 percent protein and 12 percent fat in every serving this large breed dog food formula helps maintain his ideal body condition.