Designed for dogs ages 1 year and older and up to 50 lb. Iams ProActive Health is specially formulated to help maintain your large dog's healthy joints. Protein sourced from chicken and egg helps build strong, firm muscles while 7 essential nutrients nourish the heart. Antioxidants help maintain a strong immune system. Crunchy kibbles scrub your dog's teeth with every bite to help reduce plaque and tartar buildup that can lead to bad breath. Vet recommended, this premium dog food is 100% complete and balanced, with no fillers or artificial preservatives.