Joint supplements are widely used for dogs with arthritis and mobility problems. Understanding the evidence base helps owners choose effective products that genuinely improve welfare rather than providing false comfort.
Companion dog joint supplement use reflects genuine owner concern for welfare but is often not evidence-based. Many popular supplements have weak or absent evidence of clinical benefit in dogs, meaning owners may be providing expensive products that do not improve their dog welfare while forgoing or delaying more effective treatments. The welfare implication is that dogs with arthritis may have their suffering inadequately managed while owners believe supplements are addressing the problem. The strongest evidence supports weight management — reducing excess body weight significantly reduces joint load and pain — and appropriate exercise combined with NSAID medication for moderate to severe arthritis. Fish oil supplementation as an anti-inflammatory adjunct has better evidence than glucosamine alone. Veterinary guidance on treatment selection based on individual dog needs is essential.