Dogs want to run - regardless of breed, size and age. Every dog has the joy of movement. But what if the movement is slow restricted? Does your dog show reluctance to move and indolence, he has trouble getting up and lying down, takes off his enthusiasm, he refuses to climb up stairs or jump in the car? All this may be the first signs of joint disease (osteoarthritis) and associated pain. A harmonic motion consists of the interaction of bones, muscles and ligaments and joints. Hyaluronic acid as a major component of the "joint lubricant" is the key substance for the preservation of joint function. Due to its tremendous ability to bind water (1 g hyaluronic acid can bind up to 6 liters of water), it serves as a buffer in the joints and ensures smooth movement. In diseased joints, the yaluronic acid production is reduced, but also heavy loads and increasing age reduce the proportion of hyaluronic acid in the joint.