Find a variety of cat arthritis & joint care supplements including Cosequin® and Dasuquin®. Trauma, stress, injury and even everyday activity can cause damage to the tissues that enclose the cat’s joint, the delicate synovial membrane and the fibrous joint capsule. Even as cats age, they should continue to be active and energetic, so it is important to maintain healthy joints so the cat can run, jump and move with ease.