By Dial A Vet Veterinary Team
Osteoarthritis is not one bad day in a joint. It is a slow cycle in which damaged cartilage triggers inflammation, inflammation damages more cartilage, and the joint gradually stiffens and thickens. Studies suggest a large proportion of dogs over eight have signs of it, and many younger dogs with dysplasia or old injuries are affected too. The cycle cannot be fully reversed, but it can be slowed, and pain can be controlled well enough that most dogs keep enjoying their walks.
Key takeaways
- Osteoarthritis is a progressive disease of the whole joint: cartilage, bone, lining and surrounding tissue.
- It usually develops on top of an earlier problem such as hip or elbow dysplasia, a cruciate rupture or a kneecap that slips.
- Vets use a combination of treatments rather than a single medicine. This is called multimodal management.
- Weight control and appropriate exercise are as important as medication.
- Treatment plans are reviewed over time because needs change.
What happens inside the joint
A healthy joint has smooth cartilage cushioning the bone ends, bathed in lubricating fluid. In osteoarthritis, cartilage thins and cracks, the joint lining becomes inflamed, the fluid becomes less effective, and the bone underneath reacts by forming bony spurs (osteophytes). The joint capsule thickens and range of motion shrinks. Pain comes from the inflamed lining, the bone and the surrounding muscles working overtime.
Why it starts
Osteoarthritis in dogs is mostly secondary, meaning something else set it off. Common triggers include:
- Developmental joint disease: hip dysplasia, elbow dysplasia and osteochondrosis in growing dogs
- Ligament injury: a ruptured cruciate ligament leads to arthritis in the knee within weeks to months
- Kneecap luxation, common in small breeds
- Previous fractures involving a joint
- Obesity, which increases load and also promotes inflammation
- Genetics and breed, with larger breeds and certain lines at higher risk
Signs
Signs include stiffness after rest, reduced activity, difficulty with stairs or jumping, a limp that comes and goes, and muscle loss. Some dogs show pain as behaviour changes like grumpiness or restlessness at night.
When to see a vet
Emergency now: sudden inability to use a leg, severe pain, or a joint that is suddenly hot and swollen. These suggest injury or infection rather than a slow arthritis flare.
Within a few days: a flare-up that does not settle in a day or two with rest, or a new limp.
Regular reviews: dogs with known osteoarthritis benefit from a check every few months, or as your vet advises, to adjust the plan.
How vets diagnose osteoarthritis
Diagnosis combines history, watching your dog walk and trot, and a hands-on orthopaedic exam to feel for pain, thickening, crepitus (a grinding feel) and reduced flexion. X-rays show bony changes and help identify the underlying cause, though they do not always match how painful a dog is. Your vet may use validated owner questionnaires to score pain and track response to treatment.
Treatment options
Treatment is built around your dog, often starting with a few measures and adding more as needed:
- Weight management: getting an overweight dog to a lean body condition is one of the most effective treatments available.
- Exercise modification: regular, controlled, low-impact activity rather than weekend bursts.
- Prescription anti-inflammatory pain relief: a mainstay for many dogs. Your vet will check health and blood tests and monitor for side effects.
- Monthly injectable pain treatment: newer antibody-based injections that target a pain signalling pathway are available in Australia and suit many dogs.
- Joint injections: a course of injections that may support cartilage and joint fluid is widely used by Australian vets.
- Other pain medicines: additional prescribed medicines may be added for dogs with nerve-type or more severe pain.
- Diet and supplements: joint diets enriched with omega-3 fatty acids from fish oil have reasonable evidence. Evidence for glucosamine and chondroitin is mixed.
- Physiotherapy and rehabilitation: tailored exercises, hydrotherapy, massage and other techniques from a qualified veterinary physiotherapist.
- Surgery: for some dogs, procedures that correct the underlying cause or replace or remove a joint are an option.
Prevention
You cannot prevent every case, but you can lower the risk:
- Keep puppies lean during growth, and choose breeders who screen for hip and elbow dysplasia.
- Maintain a lean body weight throughout life.
- Treat joint injuries promptly.
- Build fitness gradually rather than sudden intense exercise.
FAQ
Can osteoarthritis be cured?
No, but it can be managed very effectively, and progression can often be slowed.
Are joint supplements worth it?
Omega-3 fatty acids have the best evidence. Discuss specific products with your vet, as quality varies.
How long can my dog stay on pain relief?
Many dogs take prescribed pain relief long term with regular monitoring. Your vet will tailor the plan and checks.
Will surgery fix arthritis?
Surgery can address the cause or remove a painful joint surface, but some arthritis usually remains and still needs management.
Talk with a vet
If your dog has been diagnosed with osteoarthritis and you want to understand the options, a Dial A Vet veterinarian can talk you through them before your next clinic visit. Speak with Dial A Vet. Sudden severe lameness or a dog unable to stand needs an in-person vet urgently.
References
- Merck Veterinary Manual: Osteoarthritis in dogs
- WSAVA Global Pain Council: Pain management guidelines
- AAHA Pain Management Guidelines for Dogs and Cats
- COAST (Canine Osteoarthritis Staging Tool) development group publications
- Veterinary Clinics of North America: Small Animal Practice, osteoarthritis review issues
Disclaimer: Educational only. This page does not replace an examination or advice from your own veterinarian. If you are worried about your pet right now, contact your local vet or nearest emergency animal hospital.
