MOBILITY & JOINTS

Cat Arthritis Is Nearly Universal After 12 — and Almost Always Missed

Last updated: August 24, 2026 · Written by Sam, Founder

A cat curled up asleep on a cushioned windowsill in warm afternoon light

90% of cats over 12 have arthritis visible on X-rays. Only about 4% get diagnosed. Cats hide joint pain very differently than dogs do.

Roughly 90% of cats over age 12 have osteoarthritis visible on X-rays. In one clinical study, only about 4% of those cats had arthritis noted by either the owner or the veterinarian. That gap — not a lack of arthritis, but a near-total failure to recognize it — is the actual story with feline joint disease, and it’s almost entirely because cats hide pain in ways that don’t match what most owners are watching for.

Why the Numbers Are So Far Apart

Osteoarthritis prevalence in cats rises sharply with age: around 60% of cats six and older show radiographic evidence of joint changes in at least one joint, climbing to roughly 90% past age 12. These aren’t small, borderline changes in a minority of older cats — they’re the norm. What’s abnormal is how rarely it gets caught before an X-ray confirms it.

The mismatch comes down to what “looking painful” means for a cat versus a dog. Dog owners are primed to watch for limping, and dogs with arthritis often do limp visibly. Cats are different: in one study of cats with confirmed osteoarthritis, less than half showed any limping at all, while nearly three-quarters were reluctant to jump and two-thirds jumped a noticeably shorter distance than before. A cat that’s stopped taking its usual leap onto the counter isn’t being lazy or aloof — that hesitation is frequently the clearest sign available.

A person gently brushing an older tabby cat resting on a blanket near a window — Reduced grooming is one of the more reliable — and most overlooked — signs of joint pain in cats.

The Signs Worth Actually Watching For

Because limping is unreliable in cats, the more useful signals are behavioral and easy to miss unless you’re specifically looking:

Jumping changes. Hesitating before a jump, jumping to an intermediate surface first instead of going straight to a high one, or avoiding elevated spots the cat used to prefer.
Grooming decline, especially over the hindquarters and lower back — areas that require flexibility a stiff spine or hips make uncomfortable to reach.
General activity drop — sleeping more, playing less, greeting you less at the door.
Litter box avoidance, particularly with high-sided boxes that require a step or small jump to enter.
Touch sensitivity in specific areas, or increased irritability when picked up or handled a certain way.

None of these look dramatic day to day, which is exactly why they’re so often chalked up to normal aging — see our broader guide on signs of aging in cats owners often miss for how arthritis fits into that wider pattern. The difference matters because arthritis is manageable, while “just getting old” isn’t something a vet visit can act on.

A long-haired tabby cat sitting upright on a windowsill looking outside — A cat that's stopped taking a jump it used to make easily is showing one of the clearer signs available.

Dogs vs. Cats: Why the Comparison Doesn’t Transfer

It’s tempting to apply what you know about arthritis in dogs directly to cats, but the presentation genuinely differs. Dogs are more likely to limp visibly and to vocalize discomfort. Cats evolved as both predator and prey, which favors concealing weakness rather than displaying it — a survival trait that now works against early detection in a home with no predators to hide from. Waiting for a cat to “act like it’s in pain” the way a dog would means, for most cats, waiting for a stage of arthritis that’s already fairly advanced.

What Actually Helps

A veterinary visit is the necessary first step, both to confirm arthritis specifically (versus another condition causing similar behavior changes) and to grade its severity via X-ray. From there, feline-specific pain management and anti-inflammatory medication, weight management to reduce joint load, joint supplements, and home modifications — ramps, steps, and lower-sided litter boxes — make a real difference in a cat’s daily comfort. What doesn’t help, and can be actively dangerous, is reaching for human pain relievers: NSAIDs like ibuprofen are toxic to cats even in small doses.

The Bottom Line

Feline osteoarthritis isn’t rare or unusual in an older cat — it’s closer to the default. What’s unusual is catching it, because cats simply don’t show pain the way owners are trained to look for it in dogs. A cat that’s grooming less, jumping less, or hesitating at heights it used to clear easily isn’t slowing down for no reason — that’s frequently what arthritis looks like in a species built to hide it.

This article is for informational purposes only and does not replace guidance from your veterinarian.

FAQ

How common is arthritis in older cats?

Very common. Radiographic studies have found osteoarthritis in roughly 60% of cats age six and older, and around 90% of cats over 12. Despite that, one study found only about 4% of affected cats had arthritis mentioned by either the owner or the veterinarian — meaning the overwhelming majority go unrecognized.

Why do so few cat owners notice the signs?

Cats mask pain far more effectively than dogs, and the visible signs are subtle: reduced jumping height, hesitation before a jump they used to make easily, less time spent grooming, sleeping more, and increased irritability when touched in certain spots. True limping — the obvious sign owners watch for in dogs — is present in less than half of cats with confirmed osteoarthritis, so waiting for a limp means missing most cases.

What are the actual signs of arthritis in cats, if not limping?

Not jumping onto surfaces the cat used to reach easily, jumping to a lower surface first instead of going straight to a high one, reduced grooming (especially of the hindquarters, which are harder to reach with a stiff spine or hips), less overall activity and play, avoiding the litter box if its sides are too high to step over comfortably, and a general decrease in sociability or increased touch-sensitivity in specific areas.

Can arthritis in cats be treated?

Yes. Options include prescription pain management and anti-inflammatory medication designed for cats specifically (never human NSAIDs, which are toxic to cats), joint supplements, weight management to reduce load on joints, and home modifications like ramps, steps, and low-sided litter boxes. A vet visit is the starting point, since the same signs can also indicate other conditions that need to be ruled out first.

How is feline arthritis diagnosed if cats hide it so well?

Through a combination of a detailed history from the owner (often the only source of behavioral changes, since cats don't act painful during a brief exam room visit), a physical exam checking joint range of motion and pain response, and X-rays to confirm and grade the extent of joint changes. Because cats are so good at not looking sick when startled or handled, the owner's account of subtle daily changes is often the most useful diagnostic input a vet has.