BLUE Wilderness Senior Dog Food is formulated with 75% protein from animal sources and real chicken as the first ingredient to satisfy your dog's wild side. Blue Buffalo senior dog food also contains real fruits, vegetables, and other key nutrients to promote healthy muscle maintenance and provide energy to stay active. Like all Blue Buffalo natural dry dog foods recipes, this BLUE Wilderness chicken recipe is formulated without any chicken (or poultry) by-product meals. This natural dry dog food is also free of corn, wheat, soy, artificial flavors, and preservatives. You can feel great knowing Blue Buffalo is helping your senior dog thrive with a protein-packed diet.