Short answer: The earliest signs are small changes, not limping: slowness to rise after rest, stiffness on stairs, a shorter stride, and reluctance to jump. Arthritis also starts earlier than most owners think. The Merck Veterinary Manual says up to 40% of dogs aged 8 months to 4 years have arthritis, yet signs usually aren’t recognized until dogs are 5 to 13 years old.
Arthritis in dogs is often diagnosed later than it should be, mainly because the earliest signs are easy to write off as “just getting older” rather than a treatable source of pain.
Why Are Early Signs So Easy to Miss?
Dogs keep going despite discomfort, and long-term pain creeps in slowly. The 2022 AAHA Pain Management Guidelines put arthritis prevalence in dogs at close to 40% and note that owners often notice changes but explain them away and delay acting for several months. A 2024 study showed how big the gap is: among dogs aged 8 months to 4 years, 39.8% had arthritis on X-rays, owners had noticed impairment in only about 30% of the dogs with painful arthritis, and only two of those dogs were receiving pain treatment (Enomoto et al., 2024). The elbow was the most commonly affected joint, followed by the hip, ankle and knee.
What Early Signs Should You Watch For?
- Slower to rise after lying down, especially first thing in the morning or after a long nap
- Stiffness that eases after a few minutes of walking
- Shorter, choppier stride rather than a smooth, even gait
- Reluctance to jump onto the couch or bed or into the car, often misread as stubbornness
- Trouble with stairs, going up or down
- Shorter walks or less play, lagging behind, or wanting to turn for home early
- Sitting or lying down differently, such as sitting with a leg out to the side
- Licking or chewing at a joint
- Muscle loss over the hips or shoulders, so a leg looks thinner than it used to
- Irritability when touched around the back, hips or legs
Normal Slowing Down or Arthritis?
| What you notice | More likely normal aging | Worth a vet visit |
|---|---|---|
| Energy | Sleeps a bit more but moves freely when up | Moves stiffly or reluctantly even when keen |
| Walks | Slower pace, same distance, no stiffness afterwards | Stops early, lags, or is stiff the next morning |
| Jumping | Chooses not to, but can when motivated | Tries and fails, hesitates, or stops trying |
| Stairs | Takes them carefully | Avoids them, or needs help |
| Getting up | Stretches, then goes | Several attempts, or front legs first then a struggle |
| Mood | Mellower | Grumpy when touched, restless at night |
If you’re unsure, our guide to how to tell if your dog is in pain covers the quieter signs, and senior dog body changes from 7 to 12 explains what’s typical with age.
Which Dogs Are at Higher Risk?
In dogs, arthritis often follows another joint problem, such as hip or elbow dysplasia, a cruciate ligament injury or a luxating kneecap; Merck names inherited joint conformation problems and breed as major factors. According to Merck, hip dysplasia is most common in heavy, stocky breeds such as German Shepherds and Labrador Retrievers, and excess weight adds to the damage. In a lifelong study of Labradors, hip arthritis on X-rays rose from 15% of dogs at age 2 to 67% by age 14, and dogs kept lean developed it years later (Smith et al., 2006). See our guides to German Shepherd hip dysplasia and Labrador joint health for breed-specific advice.
What Does a Vet Visit for Suspected Arthritis Involve?
Your vet will usually watch your dog walk and trot, then check each joint for pain, swelling, thickening and range of motion, and compare muscle on each side. X-rays can confirm arthritis and look for an underlying cause. X-ray changes don’t always match how sore a dog is: the Orthopedic Foundation for Animals notes that some dysplastic dogs with severe arthritis function normally while others with minimal changes are very lame. So your observations at home matter. AAHA points to free owner questionnaires, such as the Canine Brief Pain Inventory, and short videos of your dog getting up and using stairs are useful too.
Why Does Acting Early Matter?
Arthritis can’t be reversed. Writing about elbow dysplasia, the American College of Veterinary Surgeons notes that established arthritis slowly progresses whatever the treatment, but that it can be well managed, with most treated dogs showing some improvement in lameness and comfort. Options your vet may discuss include:
- Weight loss for overweight dogs. In obese dogs with arthritis, lameness improved after about 6% weight loss (Marshall et al., 2010). Check your dog with our body condition guide.
- Regular, moderate exercise, which AAHA lists as a first-line treatment for chronic pain.
- Pain relief. The FDA has approved several NSAIDs for dogs, and Merck calls NSAIDs the most predictably effective arthritis treatment. A monthly anti-NGF antibody injection is another option. Never give human pain relievers.
- Omega-3 fatty acids, which have much better evidence than glucosamine. See whether joint supplements work for dogs.
- Home changes such as rugs and ramps. See our home modifications for arthritic pets.
This article is for informational purposes only and does not replace guidance from your veterinarian.
Sources
- Merck Veterinary Manual — Osteoarthritis in Dogs and Cats, updated August 2025
- American Animal Hospital Association — 2022 AAHA Pain Management Guidelines for Dogs and Cats, 2022
- Enomoto M et al., Scientific Reports — Prevalence of radiographic appendicular osteoarthritis and associated clinical signs in young dogs, February 2024
- Smith GK et al., Journal of the American Veterinary Medical Association — Lifelong diet restriction and radiographic evidence of osteoarthritis of the hip joint in dogs, September 2006
- Marshall WG et al., Veterinary Research Communications — The effect of weight loss on lameness in obese dogs with osteoarthritis, March 2010
- Orthopedic Foundation for Animals — Hip Dysplasia
- American College of Veterinary Surgeons — Canine Elbow Dysplasia
