Cats with arthritis rarely limp the way dogs do. Instead, they slowly stop doing things they used to do, and many owners chalk it up to “just getting older.” Over 60% of cats aged six and older have radiographic evidence of osteoarthritis, making it one of the most common conditions in middle-aged and senior cats. Knowing what to look for can mean the difference between years of silent pain and effective treatment.
Why Arthritis Is Easy to Miss in Cats
Cats are hardwired to hide pain. In the wild, showing weakness makes an animal a target, and domestic cats retain that instinct. A dog with a sore hip will hobble visibly, but a cat with the same problem will simply stop jumping onto the kitchen counter. Because the changes happen gradually over months or years, they’re easy to dismiss as normal aging or a personality shift.
The result is that feline arthritis is dramatically underdiagnosed. Most cats don’t get flagged until the disease is well advanced, partly because owners aren’t sure what to watch for and partly because cats can look perfectly fine sitting still in an exam room.
Changes in Jumping and Movement
The single most telling sign is a change in how your cat moves vertically. Healthy cats jump fluidly onto counters, beds, cat trees, and windowsills. An arthritic cat may hesitate before jumping, take an intermediate step (hopping onto a chair before reaching the counter), or stop jumping to certain heights altogether. You might notice your cat now sleeps on the couch instead of the top of the bookshelf, or waits on the floor instead of leaping onto your bed.
Stiffness after rest is another hallmark. If your cat looks a bit awkward or slow when first getting up from a nap but loosens up after moving around for a few minutes, that pattern mirrors what happens in arthritic joints. You may also see your cat taking stairs one at a time instead of bounding up them, or avoiding the stairs entirely.
Grooming and Coat Changes
Cats are meticulous groomers, so a change in coat quality is a red flag. Arthritis commonly affects the spine and hips, and when those joints hurt, a cat physically can’t twist or stretch enough to reach its lower back, belly, or hindquarters. The result is matted, tangled, or dull fur concentrated in the areas the cat can no longer reach. You might notice clumps forming along the back or around the base of the tail while the front half of the coat still looks fine.
Some cats do the opposite with painful joints: they lick or chew at the sore spot repeatedly, which can thin the fur or irritate the skin directly over the affected area. If you see a patch of thinning hair over a hip, elbow, or knee with no obvious skin condition, pain-driven over-grooming is worth considering.
Litter Box Problems
If a previously reliable cat starts urinating or defecating outside the litter box, arthritis deserves a spot high on the list of possible causes. A standard litter box with sides four to six inches high requires a cat to step up and over, and for a cat with painful hips, knees, or elbows, that motion can be genuinely difficult. Top-entry boxes are even harder.
The fix is straightforward: switch to a box with low sides, ideally no more than two to three inches high. A shallow storage container or a regular box with one side cut down works well. Place it on the same floor where the cat spends most of its time so it doesn’t need to navigate stairs. If the accidents stop after the switch, you’ve likely found the problem.
Personality and Temperament Shifts
Chronic pain changes behavior. A cat that used to enjoy being petted along its back may now flinch, swat, or walk away when you touch the same spot. Some cats become broadly more irritable, hissing or biting when picked up, when another pet bumps into them, or when they’re repositioned on the couch. Cornell University’s Feline Health Center notes that cats with osteoarthritis may resent having their joints touched or manipulated and can hiss, bite, or scratch in response.
On the quieter end of the spectrum, some arthritic cats simply withdraw. They play less, interact less with people and other pets, and spend more time sleeping in out-of-the-way spots. Reduced interest in toys or hunting-style play is common, especially if the game involves pouncing, chasing, or batting at objects that require quick joint movement.
Subtle Signs You Might Overlook
A few less obvious clues round out the picture:
- Overgrown claws. Cats naturally wear down their nails through scratching and activity. Less movement and less scratching post use can lead to nails that grow long, thick, or even curl into the paw pads.
- Muscle loss. Chronic joint pain causes the surrounding muscles to shrink from disuse. You may notice your cat’s hind legs looking thinner than they used to, or the muscles along the spine feeling less full when you run your hand along the back.
- Reluctance to use cat doors or pet flaps. Pushing through a flap requires a particular combination of lowering the head and stepping forward that can aggravate neck, shoulder, or elbow joints.
- Less interest in high vantage points. If your cat used to perch on top of the refrigerator or a tall cat tree and now stays at ground level, reduced mobility is the most likely explanation.
A Quick Home Assessment
Veterinary researchers have developed owner-friendly screening tools that focus on the specific activities arthritis disrupts. The Feline Musculoskeletal Pain Index contains 17 items organized around mobility, daily activities like jumping up and down, playing, grooming, and using the litter box, plus interactions with other pets and people. While you don’t need the formal questionnaire, those categories give you a useful mental checklist.
Over a week or two, pay deliberate attention to how your cat handles these tasks. Record short videos on your phone when you notice hesitation, stiffness, or avoidance. Cats often behave differently at home than at the vet’s office, so that footage can be the most valuable diagnostic tool you bring to an appointment.
What Happens at the Vet
A veterinarian diagnosing arthritis will typically start by palpating each of your cat’s four limbs individually, flexing and extending every joint through its full range of motion. They’re feeling for swelling, a grating sensation called crepitus, reduced range of motion, thickening around the joint, and pain responses. They’ll often examine the least painful leg first so that discomfort from a severely affected joint doesn’t make the rest of the exam harder to interpret.
X-rays can confirm the diagnosis by showing joint space narrowing, bone spurs, or other structural changes. In some cases, though, a cat’s behavior history and physical exam findings are enough to start treatment, especially since X-ray changes don’t always match the severity of pain a cat experiences. A joint that looks mildly affected on film can still be quite painful, and vice versa.
How Arthritis Is Managed
Feline arthritis can’t be cured, but it can be managed well enough that most cats regain a significant amount of their normal activity. Treatment usually combines pain relief with environmental adjustments.
One of the most significant advances in feline pain management is a monthly injection that works by blocking a protein called nerve growth factor. This protein drives pain signaling in arthritic joints, and neutralizing it can meaningfully reduce discomfort. Clinical trials showed the treatment was effective with a very low rate of side effects, and it has become a first-line option for many veterinarians because cats tolerate it far better than daily oral medications.
Weight management plays a major supporting role. Extra body weight puts mechanical stress on already-damaged joints, and even modest weight loss can noticeably improve a cat’s willingness to move. Your vet can help you set a target weight and a safe timeline for reaching it.
Home Modifications That Help
Small changes to your home can make a big difference in daily comfort. Pet stairs or ramps to the bed and couch eliminate the need for painful jumps. Raised food and water bowls reduce the strain of bending down to eat. Heated beds soothe stiff joints, and most cats gravitate toward them quickly. Keeping essential resources like food, water, a litter box, and a sleeping spot all on one floor prevents the need for stair climbing. If your cat still enjoys scratching, an angled or horizontal scratching surface is easier on the joints than a tall vertical post.
Gentle, low-impact play sessions help maintain muscle mass and joint flexibility without overdoing it. Think slow-moving feather wands at ground level rather than laser pointers that encourage sprinting and hard stops.