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O2B K9 Plus®

4.96 (50 reviews)

$ 29.00$ 169.00

O2B K9 Plus® are highly palatable dog joint supplements made from NZ marine ingredients scientifically formulated to enhance the joint health, vitality and well-being of dogs at all life stages.

$ 29.00

226 in stock

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$ 89.00

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$ 169.00

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Joint stiffness and poor condition can affect any breed or size of dog, so treat your canine companion to O2B K9 Plus® joint supplement tablets made using all natural NZ human grade marine ingredients to enhance joint mobility, connective tissue health and overall condition.

Support for:

  • Osteoarthritis & joint injury
  • Hip & elbow dysplasia & patellar luxation
  • Spinal disc problems & back injury
  • Dermatitis & skin irritations
  • Hair loss
  • Poor overall condition
  • Thyroid health
  • Senior & geriatric dogs

Key Benefits:

  • Supports joint lubrication and mobility
  • Promotes new cell and tissue development
  • Supports healing and making of cartilage
  • Enhances energy and stamina
  • Promotes healthy skin and shiny coat
  • 100% NZ natural marine ingredients

O2B K9 Plus® tablets have been formulated to be tasty treats for most dogs. Each tablet contains not only NZ marine ingredients but is full of essential vitamins, minerals, antioxidants, Glycosaminoglycan’s and trace elements that will enhance your best mate’s mobility and overall health and wellbeing. O2B K9 Plus® can be taken long term without any side effects and is an excellent addition of key nutrients to any diet and can also be taken with O2B Omega 3 Fish Oil to significantly improve your dog’s overall health and conditioning.

Learn more about dog arthritis – symptoms and warning signs to watch for here.


Each tablet contains:

  • NZ Shark Cartilage 250mg
  • NZ Greenshell™ Mussel 100mg
  • Brewer’s Yeast 40mg
  • Ascorbic acid 31mg
  • NZ Kelp 7.5mg
  • Thiamine HCL (vitamin B1) 1.65mg

The shark cartilage powder used in O2B K9 Plus® tablets is manufactured from non-endangered school and rig shark species harvested from New Zealand fisheries that operate a world class quota management system.

Excipients, flowing aids:

Microcrystalline cellulose, Dexstar dextrose, Silicon dioxide, Magnesium stearate.

For animal consumption only. Exempt from registration under the ACVM Regulations 2011



Shark cartilage is a potent source of collagen, glucosamine and chondroitin sulphates which help support joint and connective tissue health. O2B Shark Cartilage is responsibly sourced from NZ waters under specific catch quota system administrated by the NZ Government. Shark cartilage has been shown to contain powerful anti-inflammatory properties to help lessen the effects of conditions that affect connective tissue and joints, including injury, Osteoarthritis and psoriasis. Shark cartilage has over 40% pure collagen protein, plus essential and non-essential amino acids, which are necessary for elasticity of the tissues, healing of skin, torn ligaments and tendons and growth and rejuvenation of skin and connective tissues. Shark cartilage is also a good source of minerals particularly calcium, phosphorous, magnesium, potassium, zinc, iron, chromium, manganese and silica. These components are essential for the maintenance and normal function of cells, muscles, bones and joints. The primary inflammation-fighting components found in Shark cartilage are a family of complex carbohydrates called much-polysaccharides, in particular chondroitin sulfates A and C have long been used to fight inflammation.


Greenshell™ Mussel (GSM) is a rich natural source of chondroitin, glucosamine and omega 3 essential fatty acids. All 3 of these compounds are needed to maintain and rebuild connective tissues such as cartilage, tendons and ligaments. Scientific studies have shown that GSM is an effective and natural bio-active ingredient that promotes overall animal health commonly associated with mobility, healthy skin, bones and teeth, circulatory and immune systems. O2B Greenshell™ Mussels are harvested from the pristine NZ marine environment.


As a sea vegetable, Kelp has been shown to contain 46 minerals, 16 amino acids (the building blocks of protein) and 11 different vitamins. A dense source of vitamins A, B1, B2, B3, C, D and E, as well as minerals including zinc, iodine, magnesium, iron, potassium, copper and calcium. In fact it contains the highest natural concentration of calcium of any food – 10 times more than milk. There are many reasons to supplement your dog with Kelp but key reasons include to support digestion, metabolism and cellular energy production. New Zealand harvested kelp is believed to be one of the most nutrient dense vegetables on the planet. Animals that are feed kelp tend to have shinier coats, stronger nails and healthy teeth and gums.


Healthy skin, eyes and coat. Brewer’s Yeast is a fantastic source of B Vitamins specifically Folic acid, B12, Thiamin, Niacin and is packed full of minerals including Chromium, Potassium and Zinc. It also contains high levels of amino acids and is a good source of protein which help to ensure a shiny coat, healthy skin, bright eyes and good energy levels.

THIAMINE – (Vitamin B1)

Thiamine is essential nutrient for the overall good health of dogs as it converts carbohydrates into energy that powers the neurological system which regulates the heart.


Vitamin C aids wound healing, assists in bone and tooth formation, strengthens gums and all mucosal membranes of the body. Vitamin C is used to form collagen in the body which is need for healthy ligaments, tendons, cartilage and blood vessels, it vital for the function of the immune system and improves absorption and utilisation of iron.


Dosage is determined by your dog’s weight.

Under 15kg take 1-2 tablets.
15-30 kg take 2-3 tablets.
>30kg & working dogs take 3-4 tablets

Increased efficacy may be achieved by doubling dose over initial 2 week period, or as professionally directed.

For animal consumption only. Exempt from registration under the ACVM Regulations 2011

Keep out of the reach of children.

50 reviews for O2B K9 Plus®

  1. Happy bulldog again

    Review by Llana

    I’m absolutely over the moon with my old boys results, is an 11yr old brittish bulldog he’d torn his cruciate, vet said $$$$ surgery or put down or could try minimal movement locked in crate, so I bought this product and thought I’d give him 2 months, 4mnths later my boy is running around happy and healthy, I am so grateful to O2B,

  2. Marvellous cure (K9+)

    Review by R. Geddis (May 2021)

    Our American Staffy cross dog was only 2 at the time. Back hip packing up and knee damaged from running into a rock; tried every thing to help her heal. Vet said $3500 to fix knee, $5000 to fix hip; no guarantees. OMG worst outcome for a young dog. Tried different meds costing 100s of $$$ – nothing helping with pain or helping with healing…

    Our last hope to try O2B’s K9 Plus before a doing operation; then 6 months to heal – OMG don’t want our fur baby to suffer through this. So, brought K9 Plus tablets. 4 weeks later, started to put pressure on her foot, and then besides hobbling around she got better and better each week. Noticeably improving and 4 months later she began walking on her toes and front half of foot. 6 months later, walking around on her complete foot 🙂 A year and a half later she’s running around like a new born pup – no pain, no holding her back. She runs jumps and plays and is also sleeping well and still on 4 small tablet’s a day. Thankyou for your K9+ tablets o2b – our furry child is doing amazing!

  3. The absolute gold of supplements!

    Review by Lily Boyes

    Was devastated to hear from my vet that my running buddy, constant companion and always poised best friend wouldn’t be running with me ever again, short walks and monthly injections he said….
    Until I tried this product….!! So happy to have my buddy back and not sore any more, but whatever you do, don’t run out, she was hobbling within the week, keep it well stocked!

  4. Review by Keighty

    I was paying 3 times the amount for a similar product from the vet for our 10 year old lab and it was not working. I got this and in several weeks noticed a huge difference and he no longer limps or struggles to get onto the bed.

  5. Fantastic

    Review by Fafaa

    My 7 year old Rottie was a big runner, used to run with me every morning but as he’s aged he just cant go as hard as he used to, he’s down to walking now but his shoulder joints gave him so much grief even after a short walk, he would yelp getting up from his naps and you could hear his joints pop and crack. I put him on these about a month ago, and wow, what a difference. He’s still a wee bit stiff getting up in the morning, but he no longer yelps or cracks like a glow stick and his after toilet zoomies have come back with a vengeance. Highly recommend.

  6. Impressed

    Review by Ferg

    Our small dog was having joint issue with back leg. Was also very lethargic and lacked his normal appetite. The vet treated the joint issue but we felt we needed something on going to lessen chances of any further problems. This stuff has been amazing. Has his energy and appetite back. He is now his normal self. Have him and our other dog on them permanently. Bonus is they are palatable and given one of them hates tablets but eats these without any issues.

  7. 100% Recommend this product!!!

    Review by Melissa

    Our choc lab has been on this supplement for past 5 years. We noticed 5 years ago our lab was stiff and didnt want to swim anymore and was limping from joint pain. A neighbour put me onto K9 Plus and after reading reviews, there was not one negative review. Our choc lab is now 13 and we walk 6km every morning. He runs and plays with our 8 month old lab. I cannot recommend this product highly enough!!!! Havent been back to vet since. Only for his usual vaccines.

  8. K9 plus

    Review by Happy Dog

    Forgot to add in my last review. Our 13 year Staffy was going blind with cloudy eyes. After 6 months on K9 plus her eyes are shiny and bright and she can see her stick at the beach. People comment on her shiny coat and fur. More movement, a much happier, healthy dog. Thank you 02B healthy

  9. O2B K9 Plus

    Review by Happy Dog

    Our 13 year Staffordshire Terrier was on her last legs. Six months on K9 Plus and now 13.5 years old she has turned into a real pest. Never seen her so perky and happy. Swimming in the surf, chasing sticks, random happy barking. Friends at the beach think we have a new younger dog and can’t believe the change.
    This product has changed our tired old dog into a happy young pup. Thank you O2B healthy

  10. Since taking K9+ no more injections for arthritis required

    Review by No more injections!

    We use K9+ for our dog who has arthritis. Since taking K9+ we have not had to visit the Vet for anymore injections to treat the arthritis. Lyn, Nelson.

  11. It works!

    Review by Debra

    My 14 year old Lowchen suffered from arthritis in her front shoulders and elbows. Sometimes she was unable to weight bear on her right side when first rising from a nap. Wasn’t keen on drugs because of the side effects, but almost ready to give in when I found K9 Plus. After only 10 days on this product her symptoms completely disappeared and she is much more sprightly on her daily walks. Also her coat has improved.
    Big ups to you guys and heaps of thanks from me and I’m sure Summer would thank you too.

  12. K9+ Works really well for my dog!

    Review by Yuko

    My dog is 9 years old. She has got Arthritis and Spondylosis. K9+ works really well for her. She now has lots of energy and is happy again!

  13. It Really Works

    Review by Adam

    I highly recommend this product, I don’t normally write reviews but this product has had such a positive effect on our dog I feel I must.

    We have a nearly 10 year old Border Collie, who over a year ago was suffering terribly from arthritis, even short walks were uncomfortable for him and so slow. We tried all sorts of products and nothing did much, until I tried K9 plus and now a year on and I can hardly keep up with him, seriously !!!

    It does take a while to take effect, it took at least a month maybe 6 weeks to see a improvement but what a change. If your dog suffers from arthritis or stiffness give it a go and hopefully you will get great results too.

    Thanks O2B Heathy

    Cheers Adam

  14. Pills that work

    Review by Jill

    My 12 year old terrier was refusing walks until she got these pills. Now she will walk anywhere without hesitation!

  15. Added 3 years to my dogs ability to walk

    Review by Bailey

    Bailey is now 13 years old. At age 10 she suffered from chronic afthritis in her back knees and I thought it was time to say goodbye, she was clearly unconfortable with limited movement. These days she can be seen playing and jogging around the backyard. Miracle medicine!*

  16. No more limp!

    Review by Keaton

    My pug dog Bugzy has arthritis and ever since I have given her O2B K9 Plus, she has no limp or anything. She bounces around a lot more as when I first got her she was limping and was not very energetic.

  17. New Lease on Life!

    Review by Lee – Richmond

    Before: Off his food, back legs giving way, no interest in toy play
    After: Total opposite!

    My dog is 14 years old and now has a new lease on life after thinking we might have to put him down. *

  18. No vet visits in two years!

    Review by Eileen

    I have a three legged dog who was always ending up at the vets due to sprains and strain. I put him on K9 Plus it’s now been nearly two years since he’s last been to the vet due to any sprains. Our other dog is now getting older and we are putting her on them too. I would recommend K9 Plus to anyone they’re great.

  19. A Different Dog!

    Review by Linda

    My lab cross River developed arthritis as a 3 year old, and after several years of receiving 3 monthly injections from the vet it was obvious that her condition was deteriorating, to the extent that she was struggling to get out of her bed. I came across O2B K9 Plus on an internet search, placed my first order and saw a huge difference in her mobility within a week. She no longer struggled to get up from lying down and was much more active and no longer limping during exercise. After 3 months I stopped the injections and for the past 18 months of taking K9 Plus her arthritis has not still not deteriorated any further and she has an active pain-free life. I can’t speak highly enough of this product, and I’m pretty sure this has given me many more years with River that I wouldn’t have had otherwise.

  20. k9 plus

    Review by April

    I am using these for my fox terrier who sustained an injury as a pup and has now developed arthritis as an older dog. These tabs took 5 weeks to work and from being a very lame dog , she is now running without a limp, and the large swollen joint of her leg, has now halved in size. Highly recommended. Also enjoyed the discounts offered and also this is a very cost efficient formula and easy to administer.

  21. Made a difference

    Review by Julie N

    This has really helped my Jack Russel with his movement!*

  22. A brand new dog!

    Review by Susan

    Our poodle bichon x had itching and joint pain but with K9+ is now a new dog! Happy with no paw licking or itching.

  23. What a difference it has made!

    Review by Gina

    I just wanted to say what a wonderful product this is. We had two dogs on the k9 plus pills and what a difference it has made to their lives. The dogs function so much better since they have been taking these pills. If we go for a walk, I double up their dosage and they are completely fine. Off the pills one dog starts to get a sore leg and the other a sore back. These pills are magic.* Luckily for us, both dogs eat them out of our hands. Thanks for making a great product. I am always recommending it to my friends if their dogs are suffering.

  24. Given the all clear!

    Review by Sharon

    We used this as main rehab tablet for our German shepherd after his ulna osteotomy. He has recently had his 6 mth post op X-ray and we got the all clear! He also takes a combination of O2B Fish Oil and Glucosamine Powder*

  25. Keeping agility dogs in top notch condition

    Review by Agile Agility Dogs

    I have 2 border collies who compete in agility.
    Riot had a nasty accident prior to starting her agility career back in 2013. Along with other alternative treatments such as acupuncture, K9+ helps to keep her playing her agility game.
    I notice a difference in the days between doses if I run out, she becomes a little bit stiffer and not as able to keep up with the others.
    The days prior to and over a show weekend I also use K9 Octane, and I have really noticed a difference in her performance, especially on day 2 of a show where she use to slow down a bit, she is now performing as well on day 2 as on day 1.

    Hype is 20 months old and has just started her agility career, she has been on K9+ since I got her as a puppy.

    As active dogs who are asked to perform all sorts of tight turns and obstacles at speed its really important that I am able to help support their joints for years to come to be able to keep them fit and happy.
    It took me a while to find a product that I trusted and found actually worked, but since finding k9+ and K9 Octane I could not be happier, and neither could my girls!

    Thanks O2B healthy for producing such a great product!*

  26. I can't rave about you guys enough!

    Review by Cherie

    Got about a weeks worth of sample packs from my mum while at the dog show in Nelson recently and I can’t rave about you guys enough! Our nearly 10 year old huntaway X cattle dog has been very stiff in her hips and back legs lately. After a week she was so different! More energy, shinier coat and now running around and not pulling up lame when hubby takes her out for a run with the motorbike. We are definitely going to buy more of these to keep her happy and healthy. Thank you so much for making such an incredible product! And Krista thanks you too 🙂

  27. She's had great mobility

    Review by Candy

    My Wheaten Terrier has been on 3 per day for most of her 9 years after a serious knee ligament operation. Prognosis for the other knee wasn’t good. So far we’ve avoided another operation/vet fees and she’s had great mobility.*

  28. Amazing product K9+

    Review by Jackie

    My miniature schnauzer was suffering extreme pain with arthritis in her lower back. She was unable to jump and some days barely able to walk. After two weeks on this product there was significant improvement and now having taken K9+ for three months she is back to her old self – running, jumping, very happy. There is no sign of pain at all. This is an amazing product.*

  29. Ready to go the next day after a hard day's run!

    Review by Justin

    I really thought they worked well on my dogs, old and young ones… coats were shiny seemed to keep weight on them as well. I noticed they were ready to go the next day after a hard day; muscles and joints weren’t as stiff. A good feed of K9+ & K9 Octane just keeps them rearing to go… love the organic natural ingredients keep up the good work.*

  30. Does wonders

    Review by Kim

    Does wonders for my dog’s good stuff I recommend these products.*

  31. Amazing results!

    Review by Jenny, Nelson

    I’ve had absolutely amazing results for my 10 year old miniature dachsie, ‘Lolly’, who was not able to move around much. Now, you can’t keep her down!*

    I can’t recommend this product enough, thank you!

  32. Highly Recommended

    Review by Julie

    Since using the O2B K9+, my Cavalier King Charles has a whole new quality of life. I highly recommend this product to all dog lovers!

  33. The change has been incredible

    Review by Sherrie

    Our almost 12 year old GWP gundog is now bouncing around like a puppy again.

    It is most obvious she is much more fluid and before I can pick her up she has jumped into the back of the 4WD.

    The formula along with the fish oil capsules has also made her eyes brighter and her coat is now a deep chocolate liver colour. It looks like we will get a couple more years out of the old girl yet.*

  34. Brilliant product

    Review by Lou

    I have been using K9 Plus for a working heading dog of mine who had a bad leg injury (broken tendons etc). I believe the tablets really helped with the recovery process and has made a huge difference to his mobility. With his injury I was basically looking at having to retire him, but with the help of K9 Plus he continues to be a valuable working dog.

    After this experience I now give K9 Plus to my older working dogs on a daily basis – within a week there is a noticeable difference in their energy levels and mobility. I recommended this product to my parents who have a 13yr old corgi who was struggling with the onsets of arthritis. She is now a whole lot more active and comfortable, K9 Plus has worked wonders for her.*

    Thank you for a such a great product, I am constantly recommending it to other people who have dogs that are getting on a bit in age or just need a bit of a boost in general. The other great thing is that the dogs love it – mine line up in the morning waiting for their tablets and eat them straight out of my hand!!

  35. He's like a 7 year old again..

    Review by Vivienne

    K9 Plus has taken years off my 15 year old lab, Dusty’s life. He is full of bounce, energetic and the picture of life after having a hard downhill spell with sore joints seizing up his legs and neck. He’s like a 7 year old!

    He just picked up the tennis ball for the first time in 6 months and tossed it around the room playing with it. Lovely to watch.*

  36. 16 going strong

    Review by Rob

    Got this for my 16yo staffie x who lately has been looking really old. She has had a few knee ops and with her age has just been starting to seize up. She seemed to be in a bit of discomfort and wandering around constantly to ease the aches. So far it’s been a week on 2 pills a day and she’s gone mad. She has gone from waddling around slowly to madly galloping around the place. She seems to be moving a lot easier and when she lays down she doesn’t keep getting up again out of discomfort.* So far so good.

  37. Awesome product.

    Review by Lou

    We have an 8 year old Great Dane called Baz. He has got arthritis in his back left leg. Limping round not being able to put any weight on his back leg. He just wasn’t his happy self anymore. Since we started him on k9+ he doesn’t limp anymore and is happy as.* We give him 4 pills a day as he’s 76kg and we are just over the moon with results.

  38. A 9 year old Golden Retriever with the start of hip dysplasia

    Review by Chris

    We have a 9 year old Golden Retriever with the start of hip dysplasia in his right hip. He was beginning to limp occasionally and was reluctant to jump into our vehicle. As he is allergic to beef we tried the K9 Plus and he hasn’t looked back. He has much more energy, happy to jump and is back to his normal toy fetching self. We are very grateful as he has a much better quality of life because of your product.* Thank you.

  39. A much happier dog

    Review by Claire

    Turk (GSD) competes in obedience and was doing crooked sits, he couldn’t jump over small fences but after being on K9 plus & Omega 3 he can now do straight sits and jump over small fences*, he seems like a much happier dog.

  40. Brilliant

    Review by Spider

    I give these to my darling, energetic but getting noticeable older 13 year old girl, and if we run out I really notice the difference in her general well-being and mobility.

  41. O2B K9+ very good product

    Review by Peter

    Our Corgi is 13 years old and has joint problems..She could not walk up stairs or walk long distances, but after taking this supplement for a week she is walking a lot better, we have given her almost 300 tablets and no side affects.* We recommend this product.

  42. K9 Plus

    Review by Chrispy

    Our 9 year old Golden Retriever has been diagnosed with the beginnings of arthritis . He had slowed down dramatically. Being allergic to beef we couldn’t give him ordinary glucosamine. I found your wonderful product and he now has a bounce in his step, he’s jumping up into the ute again without any effort. Amazing difference, we are thrilled to bits. Thanks so much for this wonderful product as it has given him a much better quality of life.*

  43. Working dogs

    Review by Kate

    K9+ has boosted my 7 year old working dog (Hunterway bitch) who has not aged not very well and struggles to jump fences and get through a hard day at work, but since I’ve started giving her K9+; over the past six months her ability to work has improve immensely.

    Her energy levels are up, she now plays with my puppy and her general well being and coat has increased quickly since taking it.
    She’s a different dog all together.

    I recommend K9+ to anyone with working dogs or pets looking for a more affordable option aside from vet products and that really works.

    I have now started to give it to all my working dogs as they work very hard and need a boost to keep them in top health and condition every working day.*

  44. Great Product

    Review by Frank

    Using K9+ as an addition to my dog’s diets and notice the difference it has made; not only to their mobility but also to skin and coat too.*

  45. We use this in our Vet Practice

    Review by Maureen

    Great feedback from my staff and customers alike. Using K9 Plus and Feline Plus regularly in our busy vet practice and very happy with results to-date. Good value for customers and certainly works well and is another well made natural product from O2B Healthy.*

  46. What a difference

    Review by Dianne & Gatsby the dog

    Just to let you know I received the K9 plus for my dogs today. I would just like to say a huge thank you for the product the difference in my Golden Retriever is amazing. He is now playing and is a different dog since starting your product.* Once again many thanks.

  47. Awesome

    Review by Trudy

    Tried Feline Plus and saw definite results after a few days so got my dog on it now too.*

    Awesome overnight service. Thanks a million!

  48. New lease on life

    Review by Val

    I am so thankful for finding this natural product. My spaniel was going to put down, but after taking K9+ for only 2 weeks has got a new lease on life*… thank you so much.

  49. Remarkable

    Review by Sheryl

    While I was lying in bed at 6.30 one morning I was listening to Radio Hauraki and your ad come on for the dog supplement for arthritis in dogs. Right then and there I ordered some on my iphone, and it was delivered the next morning.

    My 3 year old lab was diagnosed with chronic arthritis in all her joints when she was 3 months old and is on monthly injections as well as super expensive JD’s mobility support food.

    After taking your supplement for a couple of weeks the improvement in her is mind blowing. She is a completely different dog. Remarkable.*

    Thank you so much for (firstly) advertising on Hauraki which brought your product to my attention, and (secondly) for having such an amazing product. I have recommended to heaps of people for their pets.

  50. Noticeable difference

    Review by Karen

    My dog who is a 4 yr old staffy hunt-away cross with both cruciate ligament damage and joint deterioration has been taking K9 on and off for the past 6 mths. When on the K9+ there is a noticeable difference whereby she is able to exercise and run without evident pain.*

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