32 reviews



⭐️⭐️⭐️⭐️⭐️5 Stars! Made a Difference!

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**Same formula, same volume, new packaging!**

Boost your dog's suppleness and joints. There's a scoop for that!


⭐️⭐️⭐️⭐️⭐️5 Stars! Made a Difference!

"My dog is getting up there in age and I started seeing small signs of arthritis. After only one week of being on Flexi-K9, all those signs have disappeared! Now my boy is keeping up with my younger dogs and he is happy to play fetch and tug like he did when he was younger. All my pups are taking it now. I am so happy with the results."

- Julee S, USA


As our dogs age, they become less flexible. Joints begin to stiffen as the amount of lubricating fluid decreases and cartilage becomes thinner, making activity levels decrease as movement becomes more difficult.


When signs of aging, wear and tear and degeneration set in, we will help you get your dog back on their paws again.


Flexi-K9 helps to maintain your dogs youthful vitality by promoting the natural production of joint lubricant as well as supporting the bodys antioxidant and anti-inflammatory processes. By combining 6 active ingredients in a handy scoop per day, see what the benefits are for your dog:


      • Transformational Turmeric & Black Pepper: Science has shown that Turmeric that turmeric supports the natural anti-inflammatory processes within the joint and promotes joint wellness generally in all ages. Turmeric contains 5% Curcumin, which is the main active ingredient, best known for its powerful anti-inflammatory and anti-oxidant effects!
      • Green Lipped Mussel: Green lipped mussels are rich in Omega 3 Fatty Acids, minerals, essential amino acids and glycoproteins and contain natural Chondroitin, all of which support and promote joint wellness in all ages.
      • Fish Oil Omega 3 Fatty Acids: Fish oil powder has been shown to support dogshearts, joints, immune system and skin and coat! High in omega-3 fatty acid which are an essential type of fat that helps your dogs body and brain. Dogs cant produce omega-3 fatty acids on their own and must get them from their diet.


How Much Does My Dog Need?


Flexi-K9 is fed by body weight. Your dog only needs a small amount once daily.

Check out how much your dog weighs and the amount needed:


Dog's weight: Amount needed:


1 scoops


2 scoops


3 scoops


4 scoops



What's in Flexi-K9?


Composition per 1g serving:

Glucosamine HCI


Green Lipped Mussel




Boswellia Serata


Fish Oil Powder


Hemp protein




Ascorbic acid




Customer Reviews
5.0 Based on 32 Reviews
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Jane D.
United Kingdom United Kingdom
I recommend this product

My border collie has had mobility problems in the past and I started Flexi K9 about 2 months ago. Palatable and easy to use. Cetainly seen an increase in flexibility and energy so would definitely give it a go

Sarah L.
United Kingdom United Kingdom
I recommend this product

The only joint aid to really make a noticeable difference to my ageing GSD

Sara H.
Germany Germany
I guess it's great

It takes ages to get it, just from UK to Germany. I just can imagine what takes to get it to the States. I use K9 Calm Senior Boost and it's really amazing. I can see the difference on my little reactive girl. Although she has years of training behind her ( I am dog trainer ), I can see sharper focus, better work (SAR), way better self control in different situations and all night long sleep (she's 10). We recently became your affiliate, because we really believe in your product. The only think is that it really takes too long to get it. It's hard to tell to the client that's great product but you'll get it in about month. Some of them just gave up. Maybe you can do something about that, I don't know, I just hope you'll figure it out :) I still didn't get the product you asked for but I already believe it's great! keep doing great work!

Hyacinthe E.
Canada Canada

It is easy to give in food. It seems to help with my dog's mobility but still too early to tell for sure.

Debbie Q.
United Kingdom United Kingdom

Started using Flexi a over a month ago for spaniel Murphy, he’s 8 this year so a good time to start, he has a some mobility issues due to a incident on his back leg and back. He’s taking it all in his stride, I’m sure if he was on the Flexi, he may have shown more discomfort if not taken Flexi. Looking forward to seeing him have more improvement as time goes by. Great product and seen so many benefits with the Calmk9 I’m sure this will also be a success Thank you

A-OK9 FLEXI-K9 Review
  • There’s a lesson for that

    Karl achieved off-leash freedom!

    Owner, Lynn said “We are going through a unsettled time at the moment, we are moving and there are lots of different people in our house as well as cars, noises etc. it’s not easy but I would not like to think of how he would be without Calm-K9.”

    See full Case Study
  • There’s a lesson for that

    Mabel learned she didn’t need to get involved with every dog on her walk!

    Owner, Maria said “Such a big improvement already – I can tell that this is really going to facilitate her training and allow her to focus more! We will definitely be continuing”

    See full Case Study

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