Arthritis in cats (also referred to as osteoarthritis in cats) is a far more prevalent disease than most cat parents realize, according to the U.S. Food and Drug Adminstation's Animal Health Literacy center. In fact, the vast majority of cats will suffer from it at some point in their lives, typically in their geriatric years.
Educating yourself about arthritis in cats can help you give your feline friend the prevention and treatment she needs.
What Is Osteoarthritis?
Strictly speaking, arthritis refers to any kind of joint inflammation, whether it's due to trauma, infection, cancer or immune system disorder. The World Small Animal Veterinary Association notes that the most common form of feline arthritis is caused by the degenerative process of aging, often in association with genetic diseases, like hip dysplasia. This age-related process is called "osteoarthritis," though it's also interchangeably referred to as either "degenerative joint disease" or just plain "arthritis."
Just like arthritis in people, arthritis in cats makes your kitty's joints stiff and swollen and her movements painful. It's accompanied by thinning of the joint cartilage (the protective lining of bones), fluid buildup inside the joint and the accumulation of bony material within the joint as a result of the fluid.

How Common Is Arthritis in Cats?
Osteoarthritis is a very common disease in dogs, afflicting one in every five pups. As such, dogs are the poster pets for this disease. Meanwhile, cats suffer at an alarmingly high rate, even higher than that of dogs. International Cat Care (ICC) estimates that as many as 60 to 90 percent of all cats over the age of 12 suffer from arthritis.
Larger breed cats also have higher rates of osteoarthritis than other breeds. The ICC reports that Maine coons, in particular, seem predisposed due to their size and risk of hip dysplasia, but Persians and Scottish folds can also be at risk.
Signs of Osteoarthritis in Cats
The telltale signs of a cat with arthritis include:
- Stiffness after exercise
- Loss of muscle strength
- Reduced mobility
- Changes in grooming
- Swollen joints
- Missing the litter box
- Unexplained aggression or irritability
- Difficulty standing up, climbing, jumping or going up stairs
- Sleeping more
- Possibly even a grating sound in the joints
The trouble with identifying osteoarthritis in cats is that the disease typically comes on slowly, and cats never complain about their aching joints. Most pet parents also assume the standard signs of osteoarthritis (sleeping more, walking stiffly, etc.,) are "normal" in older cats and, therefore, not evidence of a disease. If you notice these signs in your cat at any age, make an appointment with your veterinarian immediately.
