Arthritis in senior pets: tracking mobility and comfort

Articles · Senior Pets

Arthritis sneaks up quietly. A dog who is “slowing down” or a cat who has “gotten lazy” is often, in fact, sore. Because the changes are gradual and our pets are wired to mask pain, osteoarthritis frequently goes unrecognized until it is advanced. The encouraging news is that mobility and comfort are highly trackable at home, and a good record helps your veterinarian build a pain plan that actually fits your pet. This guide covers the subtle signs to watch and how to log them well.

What is osteoarthritis in pets?

Osteoarthritis (OA), also called degenerative joint disease, is the progressive breakdown of cartilage in the joints that leads to pain, stiffness, and reduced mobility. It is common and often underdiagnosed, especially because the signs are easy to dismiss as normal aging. In cats in particular, OA becomes more prevalent with age, while in dogs it can begin years before the limping becomes obvious (Merck Veterinary Manual).

The scale of the problem is significant. One widely cited estimate puts clinical signs of OA at around 20% of adult dogs over one year of age, and radiographic studies of dogs older than eight years have found OA in a large share of joints, for example over 57% of elbows in one 2024 analysis (Anderson et al., 2024). At least 30% of dogs and cats seen by veterinarians are considered senior, a group with a high likelihood of chronic pain (Monteiro et al., WSAVA, 2023). Yet, as the AAHA notes, this pain is often missed because it is mistaken for simply “getting old.”

What are the subtle signs of arthritis in dogs?

Early senior dog arthritis signs are usually about reluctance and changed habits rather than dramatic limping. Watch for hesitation at stairs, slower or shorter walks, difficulty rising after rest, trouble jumping into the car, a “bunny-hopping” gait, stiffness that eases once warmed up, lagging behind on walks, and licking at a particular joint. Mood and sleep changes can accompany the discomfort.

It helps to think in terms of “can’t” and “won’t.” A dog who can’t take the stairs two at a time anymore, or who now won’t jump onto the couch he always loved, is telling you something. Other tells include difficulty squatting to toilet, slipping on smooth floors because of weak grip, irritability when touched near the hips or shoulders, and a generally lower enthusiasm for play. Cold or damp weather often makes these signs more noticeable. None of these prove arthritis on their own, but a cluster of them is worth a veterinary mobility assessment.

How does arthritis show up differently in cats?

Cats hide pain even more skillfully than dogs, so feline arthritis is mostly revealed by what they stop doing. Instead of limping, an arthritic cat tends to jump less, hesitate before leaping, choose lower perches, groom less (leading to a scruffy or matted coat), and avoid stairs or the litter box if it has high sides.

Because cats rarely “act lame,” owners often attribute these changes to personality or old age. Look for a cat who now takes the journey up to the bed in two stages instead of one, who has accidents because climbing into a tall litter box hurts, or who has a greasy lower back because twisting to groom is uncomfortable. Reduced playfulness, hiding more, or sudden grumpiness when picked up can also reflect joint pain. Given how prevalent OA is in older cats, these quiet signs deserve attention rather than a shrug.

Why does tracking mobility help your vet?

Because pain you can measure is pain your vet can manage. Osteoarthritis is chronic and fluctuates day to day, so a structured home record reveals the real pattern, including good days, bad days, and whether a treatment is helping. That trend data lets your veterinarian tailor and adjust a multimodal plan instead of relying on a single snapshot in the exam room.

Modern veterinary pain care leans heavily on owner observations. The 2022 AAHA Pain Management Guidelines and the 2022 WSAVA pain guidelines both emphasize owner-reported, validated checklists and at-home monitoring as central to recognizing and tracking chronic pain in dogs and cats (Monteiro et al., 2023). When you can show that your dog’s “difficulty rising” score worsened over a month, or improved two weeks after starting a new plan, your vet has concrete evidence to act on. This article is educational only and is not a substitute for a veterinary diagnosis or treatment.

What should I actually track at home?

Track a few simple, repeatable things: a daily or weekly comfort and mobility rating, specific activities your pet can or can’t do (stairs, jumping, rising), the time of day or weather when stiffness is worst, weight, and any response to treatment. Short notes and the occasional video are more useful to your vet than trying to remember everything later.

A practical home log might include:

• A simple 1–10 comfort or mobility score, ideally at the same time each day or week.
• Activity flags: Did she manage the stairs today? Jump onto the bed? Need help into the car?
• Video clips of walking, rising, or stairs, which capture gait far better than a description and help your vet see subtle changes over time.
• Weight, since extra pounds add load to sore joints and weight management is a cornerstone of arthritis care.
• Treatment and response notes: what was given, when, and whether it seemed to help, so adjustments are evidence-based.

Logging these in Pawtient AI’s symptom and wellness tracker keeps the trend in one place and turns scattered observations into a clear before-and-after your vet can use to fine-tune the plan. Pawtient AI is an AI assistant and second opinion, never a diagnosis — always consult your veterinarian.

For more on caring for an aging dog, see our guide to supporting senior dogs; if you are also weighing overall comfort, our FAQ covers how to track a chronic condition over time, and our lab value translator can help if your vet runs bloodwork before starting certain pain medications.

Sources

• Merck Veterinary Manual. “Osteoarthritis in Dogs and Cats.” https://www.merckvetmanual.com/musculoskeletal-system/osteoarthritis-in-dogs-and-cats/osteoarthritis-in-dogs-and-cats
• Monteiro, B. P., et al. (2023). “2022 WSAVA guidelines for the recognition, assessment and treatment of pain.” Journal of Small Animal Practice, 64. https://onlinelibrary.wiley.com/doi/10.1111/jsap.13566
• American Animal Hospital Association (AAHA). “2022 AAHA Pain Management Guidelines for Dogs and Cats.” https://www.aaha.org/aaha-guidelines/2022-aaha-pain-management-guidelines-for-dogs-and-cats/
• Anderson, K. L., et al. (2024). “Prevalence of osteoarthritis in the shoulder, elbow, hip and stifle joints of dogs older than 8 years.” The Veterinary Journal (elbow OA ≈57.4%). https://www.sciencedirect.com/science/article/pii/S1090023324000716

By Pawtient AI Editorial Team. Educational content reviewed against published veterinary guidelines (IRIS, AAHA, WSAVA, ACVIM, AAFP). Not a substitute for veterinary care.