Small and mini dogs reach their golden years around the age of nine. If your smaller dog is a senior, giving him a food specially formulated for senior dogs may be beneficial. PRO PLAN Small & Mini Adult 9+ with OPTIAGE, contains an exclusive blend of nutrients that will help keep him as lively and curious as he can be. Found in our complete senior dog foods, OPTIAGE is a patented blend of nutrients proven to help curiosity and responsiveness. It helps maintain interaction with his family thanks to improved brain function. Made with high quality pieces of chicken, our senior dog food has been specially formulated by Purina experts to help you make the most of your time together. To help support healthy ageing thanks to specific protein and fat levels adapted to senior dogs' needs, give him the food for his changing needs.