Iams Proactive Health Chunks Adult Dry Dog Food is formulated with prebiotics that work inside the digestive tract to promote healthy digestion. This formula is specifically for dogs over the age of 1. The protein in this formula will help your dog build strong, firm muscles. This formula is also enriched with antioxidants to help maintain a strong immune system. The crunchy kibbles scrub your dog"s teeth to help reduce plaque and tartar buildup. 100% complete and balanced with no fillers or artificial preservatives.