Help your senior dog fight signs of aging with IAMS PROACTIVE HEALTH Senior Plus Dry Dog Food. Our hearty dog food is made with real chicken as the first ingredient, plus naturally sourced chondroitin sulfate and glucosamine, our senior dog food for dogs 11 years and older is designed to promote lean muscles and nourish healthy joints. IAMS PROACTIVE HEALTH Food for Dogs also is enriched with antioxidants for a strong immune system. Your senior dog will love the savory poultry flavors, and you will like that each bowl contains 100% complete and balanced nutrition without using any fillers. Give your senior dog our wholesome dog food with premium nutrition to help them look and feel their best.