Make your senior dog happy with Purina ONE +Plus Vibrant Maturity Adult 7+ Formula dry dog food. MCT-rich vegetable oil nourishes and promotes mental sharpness and showed an increased average activity level over 20 percent. Chicken is the number 1 ingredient helping create a high protein dog food that maintains his strong muscles including his healthy heart. Four antioxidant sources in this Purina dog food support a strong immune system and natural sources of glucosamine for dogs help support his joints. This premium dog food recipe supplies 100 percent complete and balanced nutrition for adult dogs. Plus this Purina ONE senior dog food is made with 0 percent fillers and the dog dry food features a highly digestible formula. Know your pal is getting a dog food kibble full of the taste and texture he loves and a wholesome recipe with no artificial flavors or preservatives.