A dog getting up more slowly makes us look for anything that might help. A supplement label can sound reassuring. A controlled study asks a harder question: did the tested diet perform better than its comparison diet?

In 45 dogs with confirmed osteoarthritis, a 12-week trial found no significant advantage of the collagen-enriched diet over placebo in the reported clinical and gait outcomes. Nine dogs discontinued.

This does not establish that every collagen product is ineffective. It concerns one diet, a small and varied group and a short period. The project had industry-linked funding. Our report is based on the authors’ published abstract; the full paper was not accessible during preparation.

Explore vets at Paws & Stays

For us at Paws & Stays, the starting point is the dog in front of us. If getting up, walking or playing changes, a conversation with the vet matters more than a promise on a packet. Write down what you notice and bring the product details to the appointment. A quieter walk together still counts as time well spent.

Original research (24 October 2026)