Have you noticed your cat is walking more slowly these days? Or walking with a stiffer gait? Does your cat run less often, or not at all? Maybe she has stopped jumping up onto your bed at night to sleep with you and in the morning to greet you? Has she stopped jumping onto your lap like she always used to? Your cat may not only be aging and slowing down, but more likely your cat may have a progressive and painful case of degenerative joint disease (DJD) or osteoarthritis (OA)—an irreversible condition of the joints. Osteoarthritis is not only a serious health problem, it is painful, uncomfortable and debilitating for your cat, physically and emotionally, because it disables and restricts them from doing the physical activities they always enjoyed doing. They can also become depressed and disheartened by their immobility and inability to do what they love – running, jumping, playing and feeling comfortable.