Around the age of 7, dogs' bodies and minds begin to undergo some age-related change. From less interaction with you, to lower engagement in daily activities, there are many signs that your dog may be reaching their senior years. PRO PLAN BRIGHT MIND Adult 7+ Medium & Large Breed Chicken Dry Dog Food contains a unique blend of brain-supporting nutrients, including enhanced botanical oils proven to promote mental alertness and sharpness in dogs aged 7 and older, with visible results within 30 days.