Add more years to your dog's life, more life to your dog's years! Animal Naturals Young at Heart is designed to help dogs look and feel their best at any age. Young At Heart includes a wide array of natural factors meant to support good health and long life. While humans live longer than ever, some breeds of dogs seem to be dying younger. Whether the cause is free radical damage, or hormone imposters, synthetic chemicals, today's dogs age prematurely fast. Youthful levels of hormones and other vital compounds decline with age. This is why joints, brain function and cellular activity decline as dogs get older. K9 Young at Heart uses new "life extension" advances with the goal of returning your dog's metabolism to that in its prime. It's not just about helping dogs live longer, it's about living better.