Dog arthritis: when green-lipped mussel fails

Eight weeks is a fair trial, and the fact you saw nothing from the green-lipped mussel powder tells me something useful — it's not that joint supplements don't work for your dog, it's almost certainly a dosing or formulation mismatch. Most powders in that category are underdosed for larger breeds, and Dalmatians at 12 are often dealing with more advanced joint change than a basic mussel powder can touch. To point you somewhere better: is your Dalmatian a typical 25–30kg build, and what are you seeing day to day — is it the mornings that are worst, or is it more about slowing down mid-walk and reluctance on stairs?

That pattern — slow to get going in the morning, then warming up but fading on longer walks — is classic moderate arthritis, and it's very treatable with the right support. The morning stiffness in particular tells me her joints are inflamed overnight when she's still. What you need is something with a meaningfully higher concentration of active compounds than a standard mussel powder, and ideally a formula that combines joint-rebuilding ingredients with an anti-inflammatory component. Before I give you a specific recommendation, one quick question: has she had any stomach sensitivity, or has she generally tolerated supplements fine?

Perfect — that opens up the best option for her. I'd recommend YuMOVE PLUS for Large Dogs. It's a significant step up from standard green-lipped mussel powders because it uses a stabilised, high-concentration form of green-lipped mussel extract rather than raw powder — the active lipid compounds are far more bioavailable. It also adds glucosamine and hyaluronic acid, which work on different parts of the joint, and it includes an antioxidant component specifically to address the inflammation that's causing that morning stiffness. For a 28kg, 12-year-old Dalmatian with moderate symptoms, this is meaningfully better matched than what you tried before. Give it 6–8 weeks at the full large-dog dose and you should see a real difference in her mornings.

The supplement does the heavy lifting, but a couple of things will help it work better. Keep her walks shorter and more frequent rather than one long one — that keeps joints moving without the inflammation that comes from overdoing it. A warm bed or an orthopaedic mat makes a real difference for morning stiffness because cold hard surfaces worsen overnight joint inflammation. And if she's carrying even a little extra weight, even half a kilogram less takes meaningful load off her joints at her age. None of that replaces the supplement, but it'll help you see the results faster.

Good plan. Stick with the full large-dog dose consistently — the most common reason these supplements underperform is irregular use or people dropping to a maintenance dose too quickly. At 12 she deserves the full support. I hope you see her moving better in the mornings within the first few weeks.