Eukanuba Pure Large Breed Adult dog food is a unique formula developed to help your large breed dog live a long, healthy life. A great combination of natural ingredients, vitamins, minerals and natural nutrition will help your dog with everything from lean muscles to healthy joints. All natural chicken is the number one ingredient, providing protein for strong, lean muscles. Natural sources of chondroitin and glucosamine help support healthy joints, while calcium promotes strong bones. High quality carbohydrates provide wholesome energy. Since it is free of by-products and artificial colors, flavors and preservatives, you can be sure your dog is getting 100% nutrition, naturally.