Joint supplements including glucosamine, chondroitin, omega-3 fatty acids, and newer nutraceuticals offer variable evidence of benefit for dogs with osteoarthritis, with some products providing genuine welfare improvement.
Joint supplements occupy an important but nuanced role in dog welfare. For dogs that cannot tolerate NSAIDs due to kidney or gastrointestinal disease, high-quality omega-3 supplements and Adequan may provide meaningful pain relief as alternatives or complements to medication. The welfare benefit of even modest pain reduction - allowing a dog to move more freely, sleep better, and engage more with their environment - can be significant. However, supplement quality varies enormously between products, and the evidence base varies by compound. Owners who spend money on ineffective supplements while declining to pursue more evidence-based interventions including weight loss and prescription analgesia may leave their dogs in preventable pain.