Osteoarthritis and chronic joint pain
Degenerative joint disease, the most common source of chronic pain in older dogs.
Osteoarthritis affects a large share of dogs over eight, and often shows up as reluctance on stairs, slowness to rise, or shortened walks rather than obvious limping. It is the best-studied condition in canine geriatric medicine, which means owners here have real randomized evidence to work from.
How it is measured
Owner-reported instruments (Canine Brief Pain Inventory, Liverpool Osteoarthritis in Dogs, Canine Orthopaedic Index) and objective force-plate gait analysis (peak vertical force).
Why this matters: canine pain and cognition trials rely heavily on owner-reported scores, and owners who know their dog is being treated tend to report improvement whether or not the drug works. Trials using objective measures such as force-plate gait analysis carry more weight here for exactly that reason.
Interventions, best evidence first
-
Strong evidence nsaid
Veterinary NSAIDs (carprofen, meloxicam, firocoxib, robenacoxib)
Rimadyl, Metacam, Previcox, Onsior
The best-evidenced treatment for arthritis pain in dogs, and the benchmark every newer drug is measured against. The real limit is not whether they work but whether a given older dog's kidneys, liver, and gut can tolerate them long-term.
-
Moderate evidence biologic
Bedinvetmab (anti-NGF monoclonal antibody)
Librela, Beransa
A monthly injection that blocks a pain-signaling protein. It genuinely relieves arthritis pain in a substantial minority of dogs and avoids the gut and kidney risks of NSAIDs, but it is not reversible once injected and its long-term joint safety is actively debated.
-
Moderate evidence analgesic
Grapiprant (EP4 prostaglandin receptor antagonist)
Galliprant
A targeted pain drug that blocks one specific inflammatory receptor rather than shutting down prostaglandin production broadly. Often chosen for older dogs where the broader gastrointestinal and kidney effects of a classic NSAID are the main worry.
-
Moderate evidence diet
Omega-3 fatty acids (EPA/DHA-enriched diets and fish oil)
One of the very few supplements with real randomized evidence behind it. Expect a modest improvement in mobility and, importantly, the possibility of getting the same pain control on a lower NSAID dose. It is not a replacement for pain medication.
-
Moderate evidence lifestyle
Weight optimization (calorie-restricted weight loss)
The single most underused treatment for arthritis in older dogs. Losing roughly 6-9% of body weight measurably reduces lameness on its own, before any drug is added. And unlike every drug here, the side effects are all good ones.
-
Evidence of little or no benefit supplement
Glucosamine and chondroitin sulfate
Cosequin, Dasuquin, and many others
The most commonly recommended joint supplement for dogs, and the one with the clearest evidence that it does not meaningfully reduce arthritis pain. Money spent here is better spent on weight loss, omega-3s, or proven pain control.