Your dog's heart is still in the game, but the stiffness, sore muscles and joints that don't move the way they used to are all part of the reality of life for hard-working Senior dogs. We've addressed the needs of 9-year-old-plus sporting dogs with our proprietary SENIOR ACHES formula. This all-natural blend promotes long-term health while at the same time dulling the pain that comes with a job well done.