Quick answer: the most common complaint in Flexadin Advanced's negative reviews, by a long way, is that the dog won't eat it: owners describe dogs refusing the chew outright or spitting it out even when it's wrapped in food. Others say it's expensive or saw no difference. There's no maker's money-back guarantee that we could find, so if your dog refuses it, getting a refund depends on the retailer. Its 3.9 rating comes from 118 reviews on zooplus's European sites, and there are very few UK reviews to go on. If any of that sounds familiar, we'd recommend trying MedPaw Hip & Joint Chews instead: a soft chicken and bacon chew given like a treat, all six key joint actives with the main amounts on the label, and a 60-day money-back guarantee for any reason, with nothing to send back.
Transparency note: this page is written by MedPaw, which makes a competing joint supplement. Reviews are quoted word for word with links so you can check them. Ratings and quotes were checked on 8 October 2026.
The most common Flexadin complaints
There are surprisingly few public reviews of Flexadin Advanced in the UK, so we read the biggest sample we could find: Flexadin Advanced reviews on zooplus, from April to October 2026. Most reviewers are in France, Germany and other European countries and their reviews are machine translated by zooplus, but the chew sold there has the same composition as the UK product. Only seven of the negative reviews had any text we could read (six one-star and one two-star), so treat these proportions as a rough guide.
What unhappy Flexadin customers complain about (our sample)
| Complaint | How often | What reviewers said |
|---|---|---|
| Dog won't eat it | 6 of the 7 negative reviews we read | Dogs refusing the chew outright, spitting it out even when wrapped in food, or eating one or two then refusing the rest; several owners disliked the smell |
| Price | About 3 in 7, plus a couple of positive reviews | Expensive for what it is, a price rise of around €10 in a month, and cheaper elsewhere |
| No difference | One review | No change after two packs; the owner switched to a cheaper product |
| Upset stomach | One review | Soft stools after the chew was crumbled into food |
"He eats absolutely everything, but not these bites"
Dogs refusing the chew is the clearest pattern in Flexadin's negative reviews:
- "Very disappointed: he's a labrador, he eats absolutely everything, but not these bites..." (Rondepierre, 1 star, zooplus, September 2026)
- "It's really hard to get him to take it, he absolutely doesn't want it" (Novembri, 1 star, zooplus, September 2026)
- "my dog spat it out even though the treat was wrapped in a piece of chicken." (1 star, zooplus, July 2026)
Vetoquinol says 95% of dogs like the chew. In the reviews we read, the dogs that don't were the main source of one-star ratings, and two unhappy reviewers even thought it was working but gave one star because their dog hated the taste: "Fortunately, I clearly saw the effectiveness and very quickly, however the smell doesn’t appeal to my dog" (Bianco, 1 star, zooplus, September 2026). A joint supplement can only help if your dog will take it every day.
"A €10 increase in just one month!"
- "But the worst part is the price: a €10 increase in just one month!" (michaela, 1 star, zooplus, August 2026)
- One owner saw no change after two packs and switched to a cheaper product.
- One owner reported soft stools after crumbling the chew into food.
The guarantee catch, and other small print
- No money-back guarantee from the maker that we could find. Flexadin is sold through vets and retailers, so refunds depend on where you buy. PDSA Pet Store, for example, only takes back unopened items within 25 days, and you pay the return postage (PDSA refund policy). That's no help if your dog refuses an opened pack.
- Labelling differs by country. The Irish zooplus listing describes one chew a day for an initial period of up to three months and suggests asking your vet before carrying on. UK listings don't mention that limit.
- Stock can be patchy. When we checked, the 30-chew pack was out of stock at VetUK and both pack sizes were sold out on zooplus Ireland.
Why Flexadin customers switch to MedPaw
MedPaw Hip & Joint Chews differ from Flexadin Advanced on exactly the points its reviewers complain about.
Flexadin Advanced vs MedPaw on the things reviewers complain about
| The complaint | Flexadin Advanced | MedPaw |
|---|---|---|
| Dog won't eat it | Chicken flavoured chew; refusal was the top complaint in the reviews we read | A different option to try: soft chicken and bacon chew, given from your hand like a treat |
| Getting your money back | No maker's guarantee we could find; depends on the retailer, and some only take back unopened packs | 60 days from delivery, for any reason, so you're covered if your dog won't take it; email us and keep the tub |
| Knowing what's in it | UC-II collagen and Boswellia, plus a little omega-3; no glucosamine, chondroitin, MSM, green-lipped mussel or hyaluronic acid | All six key joint actives, with the main amounts per chew on the label: MSM 185mg, glucosamine 170mg, chondroitin 70mg, green-lipped mussel 70mg, Boswellia 30mg, plus hyaluronic acid |
Our recommendation: if your dog turns its nose up at Flexadin, you want glucosamine, chondroitin, MSM and green-lipped mussel in the mix, or you want a guarantee that covers you if it doesn't work out, switch to MedPaw. Swap rather than stack: stop Flexadin and start MedPaw the next day. Give it six to eight weeks, and if you're not happy, email us within 60 days and we'll refund you. Try MedPaw Hip & Joint Chews.
Flexadin's rating, in context
Flexadin Advanced averages 3.9 out of 5 from 118 reviews on zooplus's European sites, with 72 at five stars and 20 at one star (checked 8 October 2026). That average hides a split: reviews are mostly either very happy or very unhappy, with relatively few in between. And it tells you little about UK owners, because we found almost none: PDSA Pet Store has no reviews yet, VetUK shows none, and Vetoquinol's Trustpilot page has three, none about Flexadin. We couldn't access Amazon UK, Pets at Home, Viovet or Animed, so check those too.
To be fair to Flexadin, owners whose dogs eat it are often pleased, it's one chew a day at any weight with no loading phase, it has a small, maker-funded published trial of the finished chew, and it contains no shellfish, so it suits dogs that can't have green-lipped mussel.
If nothing has worked so far
If your dog is still stiff or sore after a fair trial of any supplement, see your vet. They may suggest pain relief, weight loss or an omega-3 fish oil at a proper dose, which has the strongest evidence for dogs with arthritis. Read what you can safely give a dog for joint pain and the best fish oil for dogs' joints.
Our verdict
Flexadin Advanced's reviews show a product that works for some owners but leaves many others with a dog that simply won't eat it, complaints about price, and no maker's guarantee to fall back on. If that's you, MedPaw is the alternative we'd recommend. For head-to-head comparisons, read Flexadin vs YuMOVE and Flexadin vs Movoflex, or our guide to UC-II collagen for dogs.
What are the most common complaints about Flexadin?
In the negative zooplus reviews we read, six of seven were about dogs refusing the chew, even when it was wrapped in food. Other complaints were about price, including a rise of around €10 in a month, one owner who saw no difference and one who reported soft stools.
Is Flexadin Advanced any good?
Reviews are split. It averages 3.9 out of 5 from 118 zooplus reviews, with 61% at five stars and 17% at one star, and positive reviewers describe older dogs limping less. But most negative reviews are about dogs refusing the chew, there's no maker's money-back guarantee that we could find, and there are very few UK reviews. If those are your concerns, MedPaw is a soft chew alternative with a 60-day money-back guarantee for any reason.
What if my dog won't eat Flexadin?
You're not alone: it was the top complaint in the reviews we read. Refunds depend on where you bought it, and some retailers, such as PDSA Pet Store, only take back unopened items. If you try MedPaw instead and your dog won't take it, our 60-day guarantee covers you: email us and you don't need to send anything back.
Does Flexadin have a money-back guarantee?
We couldn't find one from the maker. Flexadin is sold through vets and retailers, so returns depend on the retailer's own policy. MedPaw's guarantee lasts 60 days from delivery, for any reason, and you don't need to send anything back.
What's the best alternative to Flexadin?
If your dog won't eat Flexadin, or you want glucosamine, chondroitin, MSM, green-lipped mussel and hyaluronic acid alongside Boswellia, we'd recommend MedPaw Hip & Joint Chews, with the main amounts on the label. MedPaw contains green-lipped mussel, so it isn't suitable for dogs with a shellfish allergy. Swap rather than stack, and give it six to eight weeks.
Can I switch from Flexadin to MedPaw straight away?
Yes. Stop Flexadin and start MedPaw the next day. There's no need for a gap, and you shouldn't give both. If your vet recommended Flexadin, or your dog takes any medication, check with your vet first.
