CORE Large Breed has the higher levels of protein, glucosamine and chondroitin to support the specific needs of Large Breed dogs. CORE recipes are crafted based on the nutritional philosophy that dogs, based on their primal ancestry, thrive on a natural diet mainly comprised of meat. Our Grain-Free, Protein-Rich dry dog food is packed with premium protein along with nutrient-rich superfoods and nutritional supplements to ensure your dog has everything they need to thrive from the CORE. .