Arthritis in senior cats: signs, causes, and treatment options

Your once-nimble cat used to rocket to the top of the bookshelf in a single leap. Now she takes the long way up, using the chair, then the desk, then the shelf, one careful step at a time. She sleeps more, grooms less, and when you scratch her lower back she flinches in a way she never used to. You are not imagining it, and it is not just her slowing down with age. Your cat is almost certainly living with arthritis, and there is so much more you can do to help her than you might realize.

Feline arthritis, also called feline osteoarthritis or degenerative joint disease, is one of the most common and most underdiagnosed conditions in senior cats. Research from veterinary imaging studies has found that roughly 60 percent of cats over age 6 show radiographic evidence of arthritis, and by age 12 that number rises to over 90 percent. Yet most of those cats are never diagnosed, and most are never treated. The reason is simple: cats are extraordinary at hiding pain, and the signs look less like limping than like a cat who is quietly fading.

This guide walks you through what arthritis is in cats, the subtle ways it shows up, how it is diagnosed, and the full range of modern treatment options, including a groundbreaking new injection that has changed what is possible for aging cats. The goal is to help you recognize what your cat cannot tell you, so she can spend her senior years as comfortable as possible.

What arthritis actually is

A healthy joint is a marvel of engineering. The ends of the bones are capped with smooth, glassy cartilage, and the joint is lined with a membrane that produces synovial fluid, a slippery lubricant that lets bones glide against each other with almost no friction. Ligaments and tendons hold everything in place. In a young cat, this system works so beautifully that a 10-pound animal can jump six times her own height.

Arthritis happens when that system breaks down. The cartilage gradually wears thin, develops cracks, and eventually exposes the bone underneath. In response, the joint becomes inflamed, the synovial fluid changes composition, and the bone itself begins to remodel, often forming rough, bony projections called osteophytes around the edges of the joint. The result is pain, stiffness, reduced range of motion, and progressive loss of function. Unlike a muscle strain that heals, arthritic changes are permanent and tend to worsen over time.

Arthritis in cats most commonly affects the elbows, hips, knees (stifles), lower back (lumbar spine), and ankles (hocks). Interestingly, the elbows and hips tend to be most severely affected in cats, which is different from the pattern seen in dogs, where hips and knees are more typical. This elbow involvement is part of why cats hesitate at jumping down: landing on painful elbows hurts.

Why arthritis in cats is so easy to miss

If you have ever known a dog with arthritis, you probably picture a stiff-legged limp, a reluctance to climb stairs, and a dog who yelps when he gets up. Cats almost never look like that. The way cats experience and express pain is fundamentally different, for both evolutionary and anatomical reasons.

In the wild, a cat who shows weakness becomes prey. Hiding pain is a survival instinct wired deeply into feline behavior, and our domestic cats still carry it. They will not whimper. They will not limp dramatically. Instead, they quietly adjust their lives to avoid the movements that hurt, and those adjustments are easy to misread as personality changes or "just getting old."

There is also a physical reason arthritis is hard to see in cats. Unlike dogs, cats distribute their weight fairly evenly across both front and both back legs, and arthritis in cats often affects the same joint on both sides. So instead of favoring one leg, they simply move less or move differently with all four. A cat who limps has usually injured something acutely. A cat with chronic arthritis usually just gets quieter, stiffer, and smaller in how she lives her life.

The subtle signs to watch for

Because cats so rarely show obvious lameness, recognizing feline arthritis is a matter of noticing the things they stop doing and the small ways their movement has changed. The following are the most common and reliable signs.

Reluctance to jump (or changes in how they jump)

This is often the first and most telling sign. A cat with arthritis does not simply stop jumping; she breaks the jump into pieces. Instead of sailing from the floor to the windowsill, she jumps to the couch, then to the arm, then to the sill. She may hesitate at the edge of the bed before climbing down instead of leaping. She may no longer jump onto her favorite cat tree. She may avoid the top of the refrigerator entirely. Some cats get stuck on surfaces they used to come down from easily and cry to be lifted off.

Changes in grooming

Grooming requires flexibility. A cat needs to be able to twist her spine, bend her back legs, and reach awkward angles to keep her whole coat clean. Arthritis makes many of those motions painful. Cats with arthritis often develop matted or greasy fur along the lower back, hips, and base of the tail, which are the areas hardest to reach. Some cats overgroom a single painful joint, leaving a bald or thin patch over an elbow, hip, or knee. Conversely, a few cats groom less everywhere, and their coat simply looks untidy in ways it never did before.

Changes in litter box habits

High-sided litter boxes require cats to step in and out over a tall lip, and crouching to urinate or defecate loads the hips and spine. Cats with arthritis may start having accidents just outside the box, straddling the edge, or avoiding the box entirely and going in a quieter, easier spot. This is very often misinterpreted as a behavior problem or urinary issue. In senior cats, inappropriate elimination should always raise the question of whether arthritis is playing a role.

Stiffness after rest

Watch your cat the first minute or two after she has been lying down for a long time. Arthritic cats are often visibly stiff when they first rise, taking a few slow steps before loosening up. They may arch the back or stretch awkwardly. They may look like an old person getting up from a chair, and it tells you exactly what it looks like it tells you.

Reduced activity and play

Cats with arthritis simply do less. They sleep more, play less, and interact with toys for shorter periods. They may still enjoy a feather wand, but for a minute instead of ten. They may no longer chase laser pointers. They may stop climbing the cat tree they once owned. Because this change usually happens gradually, many owners write it off as normal aging, when in fact it is the cat choosing not to do things that cause her pain.

Behavior and mood changes

Chronic pain wears on cats the same way it wears on humans. An arthritic cat may become more withdrawn, spending more time alone in quiet places. She may startle more easily, swat when picked up around the hindquarters, or avoid being held. Some cats become more clingy, seeking warmth and reassurance. Some become irritable with other pets. A previously friendly cat who now hisses when touched is almost always telling you something hurts.

Difficulty using stairs

Going up stairs loads the hind legs; coming down loads the front legs and shoulders. Cats with arthritis often start taking stairs more slowly, one step at a time, or stop using them altogether. They may linger at the top or bottom instead of following you between floors as they used to.

Changes in sleeping spots

If your cat has always slept on top of the wardrobe and now sleeps on the couch, or always slept on the bed and now sleeps on the rug, ask why. Often the answer is that the climb is no longer worth it. Cats with arthritis seek soft, warm, low places they can reach without effort.

Muscle loss along the hips and back

When a cat stops using her back legs and spine the way she used to, the muscles there atrophy. Run your hand along your cat's spine. If the bones of the pelvis or the vertebrae feel more prominent than they used to, or if the muscles along either side of the backbone feel hollow, that can be a sign of reduced activity from chronic joint pain.

What causes arthritis in senior cats?

In most older cats, arthritis is primarily a consequence of age and wear. The cartilage simply cannot regenerate fast enough to keep up with decades of use. However, several factors accelerate joint disease or predispose certain cats to develop it earlier.

Age: The single biggest risk factor. The prevalence of arthritis climbs steadily after age 6 and becomes nearly universal in cats over 12.

Excess weight: Every extra pound on a cat adds significant load to every joint, and excess fat tissue also releases inflammatory chemicals that directly damage cartilage. Overweight cats develop arthritis earlier and more severely than cats at a healthy weight.

Breed and genetics: Certain breeds are at increased risk. Maine Coons, Persians, and Siamese cats have higher rates of hip dysplasia. Scottish Folds are particularly susceptible because the gene that gives them their folded ears also causes a cartilage disorder called osteochondrodysplasia, which produces severe arthritis throughout the body, often at a young age. Abyssinians, Devon Rex, and Bengals are also overrepresented in some studies.

Previous injury: A cat who fractured a leg, dislocated a hip, or tore a ligament years ago is very likely to develop arthritis in that joint as she ages. Even injuries that healed perfectly well leave altered mechanics that lead to faster cartilage wear.

Congenital joint abnormalities: Hip dysplasia, elbow dysplasia, and patellar luxation (loose kneecaps) all create abnormal joint mechanics that lead to premature arthritis.

Chronic inflammation or infection: Cats who have had joint infections or immune-mediated joint disease earlier in life are at higher risk of progressive arthritis in affected joints.

How arthritis is diagnosed in cats

Diagnosing arthritis in cats is more detective work than test-based. There is no single blood test that confirms it, and many cats resist the manipulation required for a thorough exam. The process usually combines your observations, a careful physical examination, and sometimes imaging.

Your observations matter most

Because cats often behave differently at the vet than at home, what you report is often the most useful diagnostic information your vet has. Before the appointment, make notes on what your cat has stopped doing, how her jumping has changed, any accidents outside the litter box, grooming changes, and any sensitivity you have noticed when touching her. If you can, take short phone videos of her walking, jumping, or using the stairs. A two-minute video of a cat in her own home reveals more than an hour of exam room observation.

Physical examination

A veterinarian experienced with cats will watch your cat move around the room when possible, then carefully palpate each joint, feeling for swelling, warmth, thickening, crepitus (a grinding or crunching sensation), and restricted range of motion. They will compare left to right for symmetry. Many cats guard painful joints by tensing, hissing, or pulling the leg back, all of which are diagnostic clues. A careful exam can often identify which joints are involved and how severely.

Imaging (X-rays)

X-rays can confirm arthritis and assess how advanced it is. Classic findings include narrowed joint spaces, bony spurs (osteophytes) around the joint edges, increased bone density under the cartilage, and changes in the soft tissue around the joint. However, radiographic severity does not always match clinical severity. Some cats with dramatic X-ray changes are relatively comfortable, while others with mild changes are in significant pain. Because cats need to be positioned carefully for good images, many vets administer a mild sedative, which also lets them perform a more thorough physical exam.

Ruling out other conditions

Some signs of arthritis overlap with other senior cat conditions. Hyperthyroidism can cause weight loss and reduced grooming. Kidney disease and diabetes can cause weakness and behavior changes. Hypertension can cause sudden changes in activity. Because of this, most vets will run bloodwork and a urinalysis as part of the arthritis workup, both to rule out other problems and to assess which medications will be safe to use.

Treatment options for feline arthritis

Until recently, options for managing arthritis in cats were genuinely limited. Many of the pain medications that work well for dogs are toxic to cats, and cats metabolize drugs differently from other species. In the last few years, however, the landscape has changed dramatically, with new medications and a better understanding of multimodal management. Today, most arthritic cats can feel substantially better with the right combination of therapies.

Frunevetmab (Solensia): a game-changing monoclonal antibody

The most significant recent advance in feline pain management is frunevetmab, marketed as Solensia. Approved by the FDA in 2022, it is a once-monthly injection given at the vet's office that targets nerve growth factor (NGF), a key signaling molecule in chronic joint pain. Because it is an antibody rather than a traditional drug, it does not go through the liver or kidneys the way pills do, making it a safer option for cats with kidney disease or other organ issues that normally limit treatment choices.

Clinical studies and real-world experience have shown dramatic improvements in activity, grooming, and quality of life for many cats on Solensia, often with effects visible within a few weeks. It is generally well tolerated, with the most common side effects being mild injection site reactions. For many senior cats, especially those who cannot tolerate oral medications, Solensia has become a cornerstone of treatment.

Nonsteroidal anti-inflammatory drugs (NSAIDs)

NSAIDs reduce inflammation and pain and are one of the most effective categories of drugs for arthritis. However, cats are uniquely sensitive to NSAIDs because of their limited ability to metabolize them, and chronic use must be managed carefully. In the United States, meloxicam (Metacam) is commonly used off-label in cats at low doses, and robenacoxib (Onsior) is approved for short-term use. Long-term daily use requires careful monitoring of kidney values and should always be done under veterinary supervision. Many vets reserve NSAIDs for cats without kidney disease, or use them at reduced doses alongside other treatments.

Never give your cat ibuprofen, acetaminophen (Tylenol), naproxen, or any human pain reliever. Even a single dose of some of these can be fatal to cats. Use only medications prescribed by your veterinarian.

Gabapentin

Gabapentin is an oral medication originally developed for seizures and nerve pain. In cats, it is widely used for both chronic pain and anxiety, often as part of a multimodal arthritis plan. It is generally safe, including for cats with kidney disease at adjusted doses, and comes as a capsule, liquid, or compounded treat. Side effects are usually mild, with sleepiness being the most common and typically fading over the first few days. Gabapentin is particularly helpful for cats who get flare-ups of severe pain or who need help settling at night.

Omega-3 fatty acids

High-quality fish oil supplements containing EPA and DHA have anti-inflammatory effects that can meaningfully reduce joint pain and slow cartilage breakdown. They are safe, well tolerated, and can be added to food daily. Many therapeutic joint diets for cats already contain elevated levels of omega-3s. Talk to your vet about appropriate dosing, because quality and concentration vary widely between products.

Joint supplements

Supplements containing glucosamine, chondroitin sulfate, and green-lipped mussel extract support cartilage health and reduce inflammation. Evidence in cats is less robust than in dogs, but many cats appear to benefit. Cosequin and Dasuquin are commonly recommended brands formulated specifically for cats. These supplements are slow-acting (benefits usually build over 4 to 8 weeks) and are most useful as part of long-term joint support rather than for acute pain.

Adequan (polysulfated glycosaminoglycan)

Adequan is an injectable medication that supports cartilage and reduces joint inflammation. It is approved for use in dogs and horses and is used off-label in cats. A typical protocol is a series of injections given twice weekly for several weeks, followed by maintenance dosing. Many cats tolerate it well, and it can be part of a comprehensive arthritis plan, particularly for cats who cannot use NSAIDs.

Weight management

If your cat is overweight, losing even a small amount of weight can meaningfully reduce joint pain. Weight loss must be done carefully in cats. Rapid weight loss can trigger hepatic lipidosis, a serious liver condition. A vet-supervised plan that targets a loss of no more than 1 to 2 percent of body weight per week is safest. Measured meals instead of free feeding, therapeutic weight-loss diets, and food puzzles that slow eating all help.

Physical therapy and gentle exercise

Cats are not always enthusiastic physical therapy patients, but certain approaches work. Encouraging gentle play with feather wands, laser pointers, and small toys keeps muscles active without overloading joints. Some veterinary rehabilitation practices offer cat-specific sessions that include passive range of motion exercises, underwater treadmill therapy, and laser therapy. Keeping muscle mass helps support joints and reduces pain.

Acupuncture and laser therapy

Veterinary acupuncture has a growing body of evidence for arthritis pain in cats and is generally well tolerated. Therapeutic (cold) laser therapy reduces inflammation and can be done in short, painless sessions. Many integrative veterinary practices now offer these options as adjuncts to medical treatment.

Making your home arthritis-friendly

Medications and supplements do a lot, but the environment you provide is equally important. A thoughtful home setup can make a dramatic difference in how an arthritic cat experiences her day.

Low-entry litter boxes

Swap high-sided boxes for ones with a low entry point, ideally no more than 2 to 3 inches high. If you cannot find one, a shallow storage tub with one side cut down works beautifully. Place at least one box on every floor of the home so your cat does not have to climb stairs to reach it, and consider having more boxes than you have cats.

Easy access to food, water, and resting spots

Put food and water at ground level or raised just slightly, and place bowls on multiple levels of the house so your cat is not forced to climb. Provide multiple warm, soft resting spots on easy-to-reach surfaces. Cats love warmth, and a heated bed or a bed placed in a sunny spot can provide real pain relief.

Ramps, steps, and pet stairs

Cats who loved high perches do not have to give them up. A set of pet stairs next to the bed, a ramp to the couch, or a cat tree with widely spaced, low steps can keep a cat engaged with her world without painful jumps. Some cats take to ramps quickly; others need gentle introduction with treats.

Nonslip surfaces

Slick hardwood and tile floors are hard on arthritic joints because cats must brace themselves to avoid slipping. Placing rugs or runners in hallways, near food bowls, and around jumping landing zones gives your cat traction and confidence.

Soft, supportive beds

Thick, supportive bedding cushions sore joints. Memory foam or orthopedic cat beds are widely available, and many cats appreciate the warmth of a self-warming or low-wattage heated bed. Keep beds out of drafts, as cold worsens joint stiffness.

Grooming help

Because arthritic cats struggle to groom themselves, they need help. Brush your cat gently every day or two, paying special attention to the lower back, hips, and base of the tail. Watch for mats forming. If mats do develop, never try to cut them out with scissors, as the skin tents up inside the mat and is easy to cut. A groomer or vet tech can shave them safely.

What to avoid

• Human pain medications. Ibuprofen, naproxen, aspirin, and acetaminophen can be toxic or fatal to cats. Never give any over-the-counter pain reliever without veterinary direction.
• Dog medications or dog supplements. Many medications that are safe for dogs are not safe for cats. Dosing and formulation are different.
• Essential oils marketed for pain. Cats are extremely sensitive to many essential oils, and some can cause serious illness. Avoid these unless you have specific guidance from a veterinarian.
• Abrupt weight-loss programs. Rapid fasting in cats can trigger hepatic lipidosis. Always lose weight gradually and under veterinary supervision.
• Cold, slippery, high-perch environments. Setups that were fine when your cat was young can become sources of daily pain as arthritis develops.

When to see the vet

If your senior cat shows any combination of the signs discussed in this article, she deserves a veterinary visit. Arthritis is not something cats just have to live with, and waiting to "see how it goes" usually means years of unrecognized pain. Bring a list of specific changes you have noticed, along with any videos if you have them.

Schedule a visit soon if your cat is showing:

• Reluctance to jump or changes in how she jumps
• Matted fur on the lower back, hips, or tail base
• Accidents outside the litter box
• Reduced activity, play, or interaction
• Stiffness when first rising from rest
• Irritability or withdrawal when touched
• Difficulty using stairs she used to take easily
• Weight gain or weight loss without clear reason

Seek prompt veterinary attention if your cat shows:

• Sudden severe lameness or inability to use a leg
• Crying out in pain
• Refusing to eat or drink
• Sudden change in mobility after a fall or injury
• Swelling, heat, or redness in a joint (can indicate infection)

Living well with an arthritic cat

The most important thing to understand about feline arthritis is that it is not a verdict of decline. It is a condition that, once recognized, can be managed in ways that often transform a cat's quality of life. Cats who seemed old and tired sometimes come back to life on the right combination of Solensia, weight management, a softer bed, and a few ramps placed thoughtfully around the house. The dull eyes brighten. The games return. The cat starts grooming again. It is one of the most rewarding transformations in senior pet care, and it starts with believing that the changes you are seeing are not just "getting old."

Your cat will not tell you when her joints hurt. She will just get quieter, and smaller, and less present. Being the person who notices, who asks the vet, who insists on a workup, who tries the new treatment, who builds the stairs beside the bed, is an act of love that changes everything for her. Arthritis will still be there. But the pain does not have to be.

Senior cats have so much left to give: the trusting weight of a head on your hand, the rough rasp of a tongue on your cheek, the purr that still finds its way up through old bones. With good care, those moments do not have to be rarer. They can fill whole years of life ahead.

This article provides general information about arthritis in senior cats. Every cat is different, and diagnosis, medication choices, and treatment plans should always be guided by a veterinarian who can examine your cat and interpret her specific lab work, imaging, and history. Never give your cat over-the-counter human pain medications, and never start, stop, or change the dose of any prescription medication without veterinary guidance. If your cat shows signs of severe pain, sudden lameness, or an inability to walk, seek veterinary care promptly.