My Jack Russell Slim has been using it for a couple of months now and he loves it
GIVE YOUR HENS THE NUTRITION THEY ARE MISSING
Proudly Australian Grown and Made in Jervis Bay
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Sustainably harvested in Jervis Bay
More Eggs. Stronger Shells. Healthier Hens.
True Grit — 100% Australian Mussel Shell Grit for Backyard Chickens & Poultry. 3kg
Naturally Rich in Calcium
Independently Trialled at Bega Eggs
Grown in Jervis Bay
Zero-Waste Production
No Additives or Synthetics
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"I've seen a massive difference in my flock. The eggshells are rock-solid now and the girls have never looked healthier!"
Product description
Stronger shells, from the sea floor up.
Chickens can't make calcium — they take it from their feed, and if there isn't enough, they take it from their own bones. That's where thin shells, breakages and tired hens start.
True Grit is granulated blue mussel shell from our Jervis Bay farm — a naturally rich source of calcium. Because it's whole shell rather than a fine synthetic powder, it breaks down slowly, so your hens draw on it steadily through the day instead of all at once.
Independent trials at Bega Eggs found improvement in eggshell thickness and durability when mussel shell grit was added to the feed.
One ingredient. Nothing added, nothing synthetic.
Grown, not mined
Every shell in this bag came from one of our own mussels. Nothing goes to landfill — we clean, granulate and bag them, so the whole harvest gets used. Same water, same farm, same family, sea to bowl.
Why your hens will thrive on it
- Stronger, more resilient eggshells — fewer breakages and deformities
- Supports bone health and skeletal development in poultry
- Slow-release calcium for consistent, ongoing absorption
- Naturally rich in calcium — a whole-shell source, not a synthetic powder
- Granulated 2–4mm — the grade hens take to most readily
Why True Grit
- 100% natural — no artificial additives or chemicals
- Repurposed from our Jervis Bay mussel production
- Zero-waste — every shell repurposed, nothing sent to landfill
- Independently trialled at Bega Eggs
High Protein (52.8 g per 100 g): Supports strength, recovery, and daily energy.
Omega-3 (4.83 g per 100 g): Reduces inflammation, supports mobility, and promotes healthy skin & coat.
Phospholipids (67–68%): Help pets absorb omega-3s more effectively.
EPA & DHA (3.84 g per 100 g combined): Backed by science for joint health, brain function, and resilience.
Offer it free-choice — don’t mix it into feed.
Put True Grit in a separate dish, hopper or shallow container next to their feed and water. Hens will generally take the calcium they need when it’s freely available. Mixing it through feed removes that choice and can lead to over-consumption.
Keep it dry.
Position the dish undercover or use a covered hopper. Top up as it empties and replace if it gets wet or soiled.
Available at all times.
Calcium demand peaks overnight, when shells are formed. Constant access matters more than quantity.
One size, sized right.
Granulated to 2–4mm — the grade laying hens take to most readily. Offer it as-is, straight into the dish.
Bonus use: soil conditioner.
The same shell works as a slow-release calcium amendment for garden beds and compost. Scatter over the surface or work lightly into the top layer — it’ll break down gradually over the season.
At Marine Vitality, every batch of our Jervis Bay Mussel Powder is supported by independent analysis and industry recognised quality standards. Our approach is simple. If we claim it, we can verify it.
Independent Laboratory Analysis
Our mussels undergo detailed laboratory testing to confirm their nutrient profile, including protein levels, omega 3 composition and phospholipid content. This testing verifies the high levels of EPA, DHA and phospholipid bound omega 3s that set Jervis Bay Blue Mussels apart from standard mussel powders, including Green Lipped Mussel.
Phospholipid Bound Omega 3s
One of the most important findings in our research is the naturally high percentage of phospholipid bound omega 3s. Independent analysis shows that Jervis Bay Blue Mussels contain 68 percent phospholipid bound omega 3s, which supports superior absorption and more effective delivery of EPA and DHA.
Nutrient Density and Protein Quality
Testing also confirms the rich protein content and broad nutrient profile of our mussels. The protein is naturally complete and highly digestible, making it suitable for both dogs and cats as a daily nutritional support.
Comparative Analysis
Our mussels have been directly compared with standard mussel powders, including New Zealand Green Lipped Mussel. The findings show naturally higher levels of bioavailable omega 3s and a stronger overall nutrient density in Jervis Bay Blue Mussels. These differences reflect both species characteristics and the unique marine environment of Jervis Bay.
Sustainable, Local and Traceable
All mussels are produced in the pristine waters of Jervis Bay and processed under strict quality controls. Our production is zero waste, with both mussel meat and shell utilised. We work with accredited facilities that meet Australian food safety and aquaculture standards to ensure consistency and purity in every batch.
Ongoing Quality Assurance
We continue to work with researchers and industry partners to refine our data and maintain a high standard of product integrity. As more research becomes available, we will update our testing summaries so that customers always have clear and current information about what is in their pet’s bowl.
This commitment to transparency and ongoing testing is at the heart of Marine Vitality. We want you to feel confident that every serve of Jervis Bay Mussel Powder is grounded in real science and produced with care.
- Processed in a NSW Food Authority approved human-grade facility.
- Best Aquaculture Practices (BAP) certified
- Responsible, sustainable farming.
- Zero-waste production – every part of the mussel and oyster is put to use.
- Award-winning quality – trusted in premium food, now crafted for pets.
Have a question?
30 Day Risk-Free Trial
Free Shipping On Orders Over $80
Sustainably harvested in Jervis Bay
True Grit Shell Grit — 3kg
Key Benefits of True Grit Mussel Shell Grit
Bega Eggs Independent Trial
Found improvements in eggshell thickness and durability when mussel shell grit was added to the feed
Naturally rich in calcium
Strengthens eggshells, reduces breakage, and supports healthy bone development in poultry.
Granulated 2–4mm
The grade laying hens take to most readily. Slow-release, whole shell — not a fine synthetic powder.
Eco-Friendly & Zero-Waste
100% natural, repurposed from mussels grown on our own Jervis Bay farm. Nothing sent to landfill.
Additional applications: natural soil conditioner
Mussel Shell Grit is not only valuable for animal feed but also serves as an effective soil conditioner. When applied to agricultural land, it helps:
🗸 Improve soil pH by reducing acidity
🗸 Enhance soil structure & water retention
🗸 Provide slow-release calcium for plant growth
A natural, zero-waste use — made from Jervis Bay mussel shells, nothing is wasted.
How To Use
Free-choice calcium — offered alongside their feed, never mixed into it.
Step 1
Offer it free-choice — don’t mix it into feed
Put True Grit in a separate dish, hopper or shallow container next to their feed and water
Step 2
Keep it dry
Position the dish undercover or use a covered hopper, and replace it if it gets wet or soiled
Step 3
Available at all times
Calcium demand peaks overnight, when shells are formed — constant access matters more than quantity
One size, sized right.
( Granulated 2–4mm )
The grade laying hens take to most readily. Offer it as-is, straight into the dish.
Granulated 2–4mm
A quick note
Hens will generally take the calcium they need when it’s freely available. Mixing it through feed removes that choice and can lead to over-consumption.
For Best Results
Keep the dish topped up as it empties and store the bag sealed in a cool, dry place. Constant access matters more than quantity — calcium demand peaks overnight, when shells are formed.
Meet The Chief
In this interview, Scott, CEO of Marine Vitality, shares the story behind the brand and why it exists.
Farming mussels in the pristine waters of Jervis Bay, Scott has spent his career in aquaculture, drawn to shellfish farming for its sustainability and ability to work with nature rather than against it.
Real Results. Real Joy.
Marine Vitality isn’t just another pet supplement — it’s functional ocean nutrition made simple.
Each ingredient is pure, powerful, and purpose-driven to enhance your pet’s daily health and vitality.
One ingredient at a time. No fillers. No fluff. Just results.
Sprinkle it daily — nature takes care of the rest.
Mussel Powder Magic
Protein + Omega-3s for strength and mobility.
Sustainably sourced from pristine Jervis Bay waters, our Australian Mussel Powder delivers essential nutrients that support joint health, flexibility, and overall vitality.
Meet our resident pet nutritionist
Ruth Hatten
Meet our resident pet nutritionist
Ruth Hatten
As an animal naturopath and pet nutritionist, I only stand behind products that align with my values - clean, nourishing, and supportive of real, lasting health.
Marine Vitality’s mussel powder is rich in naturally occurring nutrients that support joint health, mobility, immune resilience, skin repair and overall vitality in dogs and cats.
With just a small amount, you can meaningfully boost your pet’s bowl. I’m proud to lend my name to these natural, science-backed, Australian-sourced products that bring the best of marine nutrition to everyday feeding.
Customer Reviews
Overall rating: 4.5 / 5 from 744 reviews.
They love this product, even the one fussy fellow is a reverse cycle bilge pump when this is sprinkled on previously refused tucker.
We have noticed a significant difference in our 8 yr old Rottweiler. Hes gone from not wanting to walk far to being able to do quite a decent beach walk. Definitely recommend this product 👌
We noticed Tito was limping on one of his back legs, and our vet recommended supplements. Luckily, we found this amazing brand! After using three containers, the improvement was incredible. Tito is now running around just like he used to, and seeing him happy and active again gives us such peace of mind. We’ve just received our second order, and I really wanted to share our experience so more families know that effective, affordable supplements are out there. We’re so grateful to have found this product. Seeing Tito enjoying life again means everything to us! ❤️🐾
Loving the mussel powder! shiny soft coats & energetic babies :) our boy shepherd had a acl replacement 2 months ago and is going very well in his recovery, sprinkle on food for all of them, & they lick their bowel’s clean :)
The chooks had some traditional shell grit, which they weren’t that interested in, however when I introduced the True Grit they readily pick at it.
My girls are loving the grit!
I have tried lots of things for my hens soft shelled eggs and not really had any improvements till I gave marine vitality a go. I am extremely happy with this product. Eggs now have nice hard shells.
Great product
My little Pablo who is a chihuahua who I adopted 15 months ago came from a family who fed him cat food🥺he has been now on the marine vitality and it has helped him with his coat and his mobility 😊
The girls love this when occasionally mixed with their calcium treat blend mix. I leave the bowl just with the shell grit in their run so they can have some whenever they need.
Our 7 yr old boy loves the ball and the beach but after each time he found it harder to get up on his bed/ we started with marine vitality 3 months ago and he finds it so much easier to get up now and never hesitates to jump into the car- snd he just loves his food with the mussel powered on it thank you from him and we love the convenience and the concept and the product source so will continue to use it for years to come thank you
Mabel is 15 years old and still gets the zoomies occasionally. Marine vitality has made a big difference to her appetite and her energy levels. Aging gracefully 😍
Sully loves it and I have seen a differnce in him since using vitality mussell powder. When my son brings his 2 sausage babies over I feed them with a teaspoon over their food.
This is my oldest baby , at 15 she,s still loving life.. with other bros and sis.
Our dachshund's coat is very glossy. I am hoping that his back cartilage is being supported with the product.
My girl scratches and licks her paws a lot so I thought I would try this and it’s taken about a month and a half to start working. So much so I weaned her off apoquel!!! She still licks her paws a little but not as much as she used to. Just ordered my second lot ❤️
My mastiff x bully is 8yrs old she has been groaning getting up and slow to get moving We have only been using for a couple weeks now BUT.. the groaning has stopped and there is more pep to her step We have tried a LOT of other products, this one seems to be working for her 💯 happy and can't wait for better results with her staying with this awesome product
She just won’t eat it!🤷♂️
My Daughter chickens love the stuff they go crazy over it as they r on there 3 bag this week l'll get them more today because l'll need it . She 13 chickens
My big girl loves it , I also have 3 other dogs who all love it too .. keep it up ..
My 18 yr old Shitzu ,Mia ,was hobbling around from muscle wastage & back leg weakness , tried Pets park & a few others , than you're Musssel powder , in a couple of weeks she walks around the backyard & doesn't tip over & she eats up all her meals , now giving to my over 30 kg staffie ,Marley, as a preventative & we love Jervis bay ,its magical 🤗
Loves it on his breakfast - he definitely seems healthier and his fur looks better and the itching has radically been reduced. Almost no itching now. His overall health has definitely improved - thank you Marine Vitality 🙏🏻
This is my first re order of the product. My frenchie is 1 year old now and her energy levels are 💯 Her eyes are clear, her coat soft and shiny, but most of all her muscle definition is obvious, and there is no sign of stress on her legs. I purchased an extra tub for my friends staffi who is 8 years old and has been struggling with his legs. I’m looking forward to seeing how he responds to the product
We have added True Grit Shell Grit to our chookies food and they just love the combination. Our chickens say its a winner!
My two dogs are on there 3rd tin. They are full of beans, happy and healthy. Their fur is extra soft, especially Bonnie's, (schnauzer) which is usually corse hair dog. Love the stuff.
The daxies love the taste when I sprinkle it over their food. They have a lovely shiny coat and are very energetic
We bought the traditional white shell mix and there was some improvement in the egg quality but you can tell the chicken weren’t keen. Swapped it out and you would think I had put a bowl of black sunflower seeds out. The eggs & hens have all levelled up! Great product.
Tried marine vitality for my 2 older dogs, was happy with how it’s helped my dogs, the eldest had a full blood check recently for being over 8, with great results all round, so I will keep them on this wonderful addition to their meals!
Keeva the Koolie is loving her Vitality! She can play & run now keeping up with the younger dogs without coming up lame. She is not shedding hair now & her coat is beautiful & shiny. Thank you to this wonderful Australian product 🙏
This is the 2nd time we have ordered this product. Our 4 legged fur baby Bear absolutely loves the taste. No trouble with eating it. Just mix with his night food. We thought at first it wasn't doing anything for him, but once 1st order finished and had to wait a few days for 2nd order, as we weren't going to re order, he started to go backwards with his walking. So it was definitely doing something for his hips and legs. Will keep him on it, as it is helping his traction on our floor boards at home also. Just loves life at the beach, when ever we get there on our holidays, as we love to travel with him. Bear is an English Staffy and over 13 years old now. Just wanted to give him a better quality of life in his old age. Highly recommend this product.
Marine Vitality are an essential Australian based pet supplement company that have honest integrity. They care for preventive treatment to help pets in later stages of health and strength as they get older. Have found this supplement very good. Highly recommend 👌
Ivy wasn’t put off by the fish smell at all. Still devours everything put in front of her.
mum,dad and a pup
Having a Labrador x cocker spaniel, he's a huge food lover, he absolutely loves the green mussel topper and licks the bowl multiple times after each meal. His coat has always been shiny but we've noticed it is now so soft after just a few days. Love this.
Bowl is empty. Tex eats all his dinner. I will buy the kilo bag next time.
Fantastic, our ferrets love it, farm cats like it & guard dogs enjoy it. So easy to spread onto their food !
It's wonderful, the colour lets me see if it's being eaten.
Frequently Asked Questions
Marine Vitality is 100% pure Australian blue mussel powder — nothing else. No fillers, no additives, no synthetics. The mussels are sustainably farmed in Jervis Bay, NSW, and gently processed to preserve their natural nutritional profile. Each serve delivers naturally occurring omega-3 fatty acids, glucosamine, chondroitin, high-quality marine protein and phospholipids.
Yes — it's the exact same 150g mussel powder. The active ingredient and nutritional profile are identical. We've created a separate horse page because the dosing, introduction schedule and feeding tips are different for equines, but the product itself is the same one trusted by dog and cat owners across Australia.
Both are valued sources of marine nutrition, but Australian blue mussels have some distinct advantages. Independent analysis by the University of Newcastle found our Jervis Bay mussel powder delivers a higher total omega-3 content (4.83g per 100g vs 3.9–4.5g for NZ green-lipped mussels) and a higher phospholipid fraction (68% vs ~59%). Phospholipid-bound omega-3s are more readily absorbed by the body than free fatty acids, which means your horse gets more out of every serve. Our mussels are also farmed and processed entirely in Australia — no import lag and full traceability from sea to stable.
Most horse owners start to notice changes in comfort and movement within 3 to 6 weeks of reaching the full daily dose. Results vary depending on your horse's age, weight, existing joint condition and overall diet. The loading phase (double dose for the first two weeks) is designed to build up levels faster. Consistency is key — this is a whole-food supplement that works best as part of a daily routine.
Product & Nutrition
Jervis Bay Mussel Powder is a single-ingredient, whole-food supplement made from 100% Australian blue mussel meat. It provides naturally occurring omega-3 fatty acids, phospholipids, protein and marine amino acids to support overall wellbeing as part of a balanced diet.
We use Australian blue mussels sustainably grown in Jervis Bay, NSW. Our mussels are grown, harvested and processed locally, giving us full traceability from sea to bowl.
Australian blue mussels are a highly nutritious marine food, naturally rich in omega-3s, phospholipids, protein and marine amino acids.
Independent research has shown Australian blue mussels to be comparable, and in some areas nutritionally superior to green-lipped mussels, particularly in phospholipid content, which supports bioavailability. Local sourcing also allows greater control over freshness and quality.
Jervis Bay Mussel Powder is a whole-food powder, not an extract. The mussels are gently processed and milled without isolating or concentrating individual compounds. Nutrients remain in their natural food matrix, supporting gentle digestion and long-term use.
Bioavailability refers to how easily nutrients are absorbed and used by the body. In whole marine foods like mussels, omega-3s are naturally bound to phospholipids, which can support absorption compared to isolated oils. This makes whole-food marine nutrition a food-first option for everyday use.
No. Jervis Bay Mussel Powder is a supplementary whole food designed to be added to your pet’s existing diet. It does not replace complete pet food.
Yes. Jervis Bay Mussel Powder is designed to complement a wide range of feeding styles, including raw, home-cooked, fresh and premium commercial diets.
No. The product contains one ingredient only: whole Australian blue mussel meat.
Our mussels are grown in the clean, nutrient-rich waters of Jervis Bay and produced in accordance with Australian food safety standards. Independent testing has shown levels to be within safe limits.
As a whole-food product, nutrient levels can naturally vary between harvests and seasons. Rather than isolating or standardising individual compounds, we focus on consistent quality, sourcing and processing so nutrients remain in their natural food form.
Our zero-waste aquaculture model means every part of the mussel harvest is valued and utilised. This supports sustainability while allowing us to maintain freshness, reduce unnecessary processing and keep full control over quality.
Store in a cool, dry place with the lid tightly sealed to maintain freshness