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Greenshell™ Mussel Powder for Senior Dogs for Mobility & Joint Comfort

$21.00 $25.00

Is your dog taking the stairs a little slower? Hesitating before the jump into the car? Stiff for the first ten minutes of every morning walk?

Joint discomfort creeps up quietly. By the time you notice the limp, the cartilage has usually been wearing for a long while — and most "hip and joint" supplements answer it with a long ingredient list where the thing that actually works is at the bottom, in a dose too small to matter.

Colt's Woof Greenshell™ Mussel Powder is the opposite. One ingredient. 100% New Zealand Greenshell™ mussel (Perna canaliculus), freeze-dried whole and milled to a fine powder. No fillers, no binders, no flavourings, no "proprietary blend." Just the mussel — which is exactly the form the clinical research used.

Green-lipped mussel is one of the most studied natural joint ingredients in veterinary medicine, and this is the certified article: our powder carries the 8+ Lipids quality mark from New Zealand Aquaculture, independently verifying both its New Zealand origin and its lipid content. Most GLM sold in the US can't say that.

Sprinkle it on dinner. That's the whole routine.

Certified New Zealand Greenshell™ mussel powder — a single-ingredient food topper that supports joint comfort, mobility, and healthy cartilage.

  • Certified by New Zealand Aquaculture: carries the 8+ Lipids quality mark for verified origin and lipid content
  • 8.8% marine lipids: naturally rich in Omega-3s (EPA & DHA) and glycosaminoglycans (GAGs)
  • Truly single ingredient: no fillers, binders, or padding. Just Perna canaliculus
  • One level scoop per 25 lb: the 4 oz jar is roughly a 3-month supply for a medium dog

SINGLE INGREDIENT · NEW ZEALAND CERTIFIED · BATCH TESTED

Find out more about this scientifically proven supplement HERE

Scientific Studies

Our formulations are guided by scientific research to ensure effective, nature-powered support for your dog's wellness.
Joint Health Efficacy for Degenerative Joint Disease
The Findings: Clinical trials showed that GLM extract is well-tolerated and effective in managing symptoms for dogs diagnosed with presumptive degenerative joint disease.
Pollard, B., et al. (2006). "Clinical efficacy and tolerance of an extract of green-lipped mussel in dogs." New Zealand Veterinary Journal, 54(3), 114-118. https://doi.org/10.1080/00480169.2006.36622
Mobility Study Improvement in Arthritic Signs
The Findings: This study demonstrated significant improvements in joint mobility and a reduction in arthritic signs in dogs supplemented with Green-Lipped Mussel over a six-week period.
Bierer, T. L., & Bui, L. M. (2002). "Improvement of arthritic signs in dogs fed green-lipped mussel (Perna canaliculus)." The Journal of Nutrition, 132(6), 1634S-1636S.
Pain Management Effects on Behavior and Function
The Findings: Research indicated that a diet enriched with GLM positively influenced pain behavior and physical functioning in dogs suffering from clinical osteoarthritis.
Rialland, P., et al. (2013). "Effect of a diet enriched with green-lipped mussel on pain behavior and functioning in dogs." Canadian Journal of Veterinary Research, 77(1), 66-74. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3524818/
Veterinary Review Comprehensive Veterinary Trial Review
The Findings: A detailed review of various veterinary trials confirming that GLM is a scientifically supported complementary therapy for canine osteoarthritis.
Eason, C. T., et al. (2018). "Greenshell™ mussels: a review of veterinary trials and future research directions." Veterinary Sciences, 5(2), 36. https://doi.org/10.3390/vetsci5020036
Arthritis Signs Reduced Pain & Swelling
The Findings: In a double-blind study of 31 dogs with varying degrees of arthritis, dogs fed green-lipped mussel powder showed significant improvement in total arthritis scores — with vets individually scoring joint pain, swelling, crepitus and range of movement.
Bui, L. M., & Bierer, T. L. (2003). Veterinary Therapeutics, 4, 397–407. https://pubmed.ncbi.nlm.nih.gov/15136981/
Osteoarthritis Measured Against an NSAID
The Findings: In a randomised, double-blinded trial, 45 dogs with radiographically confirmed osteoarthritis were given green-lipped mussel, an NSAID (carprofen), or placebo over 8 weeks. Researchers concluded GLM may be beneficial for dogs — including where NSAIDs cannot be used.
Hielm-Björkman, A., Tulamo, R-M., Salonen, H., & Raekallio, M. (2009). Evidence-Based Complementary and Alternative Medicine, 6, 365–373. https://pmc.ncbi.nlm.nih.gov/articles/PMC3525174/
Gait Analysis Objective Activity (Measured by Sensor)
The Findings: In a double-blinded, placebo-controlled cross-over trial, 32 New Zealand working farm dogs with musculoskeletal abnormalities each received two doses of green-lipped mussel extract and a placebo, 8 weeks apiece with a 4-week washout in between, while wearing a collar-mounted accelerometer that recorded movement continuously. Treatment with the mussel extract increased peak activity in dogs with signs of joint disease. The researchers concluded that even mildly affected working dogs may benefit.
Cave, N., Bolton, S., & Cogger, N. (2024). "A pilot study to detect the effects of a green-lipped mussel (Perna canaliculus) nutraceutical on working farm dogs with musculoskeletal abnormalities using accelerometry." New Zealand Veterinary Journal, 72(6), 323–333. https://pubmed.ncbi.nlm.nih.gov/39112015/

Green-lipped mussels have been part of coastal Māori diets for centuries, and modern researchers took notice for a simple reason: the people eating them didn't seem to get arthritis. What the science eventually found inside the mussel was an unusual combination — Omega-3 fatty acids (EPA & DHA) alongside a rich profile of glycosaminoglycans (GAGs), the building blocks of cartilage and the synovial fluid that cushions every joint.

That combination is why whole mussel powder outperforms isolated glucosamine: you're feeding the entire natural matrix, not one component of it.

Why ours is different. Not all green-lipped mussel is equal. Lipid content varies, origin is often vague, and the delicate Omega-3s oxidise easily if the powder isn't handled properly. Our Greenshell™ powder is cold-processed and lipid-stabilised before freeze-drying to protect those fatty acids, then verified: New Zealand Aquaculture's 8+ Lipids quality mark confirms it is genuinely from New Zealand and genuinely exceeds 8% lipids. Our current batch tests at 8.8% lipids and 65.5% protein.

How to use. Mix into food once daily — about one level scoop (1 cc) per 25 lb of bodyweight. Introduce gradually over 5–7 days.

Dog size Bodyweight Daily
Small up to 25 lb 1 scoop
Medium 25–50 lb 2 scoops
Large 50–90 lb 3 scoops
Giant 90 lb+ 4 scoops

Active support: for dogs with active discomfort, double the daily amount for the first 4–6 weeks, then return to the daily amount. Most dogs show a noticeable difference within 4–6 weeks.

Guaranteed Analysis: Crude Protein (min) 60% · Crude Fat (min) 7% · Crude Fibre (max) 1.0% · Moisture (max) 6% Ingredients: Dried green-lipped mussel (Perna canaliculus). That's it. For supplemental feeding only. Contains shellfish.

Important Pet Health Notice: The information provided on this website, including any references to clinical studies, is for general informational and educational purposes only. Our products are designed to support your dog’s natural wellness and mobility.

Not a Substitute for Veterinary Care: This information does not constitute veterinary advice. Always consult your vet before starting a new health regimen or if you have specific concerns about your pet’s medical condition.

Scientific Substantiation: Claims regarding the benefits of our ingredients are supported by peer-reviewed clinical research and independent laboratory studies. View our full research citations under the Clinical Studies tab.



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