If you have searched "Synoquin not working", you are probably a few weeks into giving it and have not yet seen the change you hoped for. That is a frustrating place to be, especially when you can see your dog stiff after a nap or hesitating at the stairs.
In most cases the useful answer is not "this product has failed" or "switch straight away". It is a short checklist. Is the dose right? Has it been given for long enough? Is the rest of the joint-care plan in place? Does a vet need to take a look? We will go through each of those in turn.
One thing to say at the start: no joint supplement can promise a result. A supplement is a complementary feed that supports joints alongside veterinary care, not a replacement for it.
Synoquin EFA and MedPaw: what each formula lists
Once you have checked the dose and given it enough time, the next item on the checklist is the formula itself. Knowing exactly which joint actives your dog is getting makes the next decision much clearer.
The table below sets Synoquin EFA beside MedPaw Hip & Joint Chews Max, which is our own product, and three other UK options, starting with a score for key joint actives.
UK dog joint supplements compared, ingredient by ingredient
| Ingredient | MedPaw Hip & Joint Chews Max | Synoquin EFA | NutraPaw Joint Support | YuMOVE Joint Support PLUS Max | Seraquin Joint | Nutraquin+ |
|---|---|---|---|---|---|---|
| Key joint actives | 6 of 6 | 2 of 6 | 4 of 6 | 3 of 6 (+1 via mussel) | 2 of 6 | 3 of 6 |
| Glucosamine | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Chondroitin | ✓ | ✓ | ✗ | Via mussel | ✓ | ✓ |
| MSM | ✓ | ✗ | ✓ | ✗ | ✗ | ✗ |
| Green-lipped mussel | ✓ | ✗ | ✓ | ✓ | ✗ | ✗ |
| Hyaluronic acid | ✓ | ✗ | ✓ | ✓ | ✗ | ✗ |
| Boswellia | ✓ | ✗ | ✗ | ✗ | ✗ | ✓ |
| Omega-3 | Mussel, flax | Krill oil | Mussel | Mussel, fish oil | ✗ | ✗ |
| Turmeric | ✗ | ✗ | ✓ | ✗ | ✓ | ✗ |
| Collagen | ✗ | ✗ | ✓ | ✗ | ✗ | ✗ |
| Antioxidants | Vit C, Vit E, zinc | Vit C, zinc | Manganese | Vit C, Vit E, manganese | ✗ | Vit C, zinc |
| Format | Soft chew | Tablet or capsule | Tablet | Tablet | Chewable tablet | Capsule |
| Guarantee | 60 days | Not stated | 90 days | 6 weeks | Not stated | Not stated |
✓ = included, ✗ = not listed. Key joint actives: glucosamine, chondroitin, MSM, green-lipped mussel, hyaluronic acid and Boswellia. Taken from each manufacturer's published information, September 2026.
Synoquin EFA lists glucosamine, chondroitin and krill oil, which scores 2 of 6 for key joint actives. It does not list MSM, green-lipped mussel, hyaluronic acid or Boswellia. MedPaw is the only one of the six products with all six, so a dog who still seems stiff after a nap is getting a much wider range in one daily serving.
MedPaw is a soft chew given daily as a complementary feed that supports joints, mobility and comfort alongside veterinary care. The label doubles the amount for the first three weeks and recommends 2-3 months of daily use for optimal results. A 60-day money-back guarantee and Subscribe & Save are available.
See MedPaw Hip & Joint Chews Max Take a look at the full ingredient list and feeding guide to see how the all-six-actives formula could fit your dog's daily routine.
What Synoquin EFA actually contains
It helps to know exactly what you are giving. Synoquin EFA comes as a tablet or capsule. The key ingredients are glucosamine, chondroitin and krill oil, and the krill oil is a source of omega-3 fatty acids. It also contains vitamin C and zinc.
It is positioned as a complementary feed intended to support joints and mobility as part of your dog's daily routine.
Going by the manufacturer's published information, it does not list MSM, green-lipped mussel, hyaluronic acid, Boswellia, turmeric or collagen. Its guarantee is not stated. For the exact form of each ingredient and the full list, please check the current pack label.
A note on taste
Synoquin contains krill oil, which can have a fishy smell and taste. Some dogs love that. Fussy dogs may turn their noses up, which matters more than it sounds, as we will see below.
Following the Synoquin feeding guide
We do not quote exact doses here, because the right amount depends on the version you have and your dog's weight. The pack label is the one source to trust, so check it against your dog's current weight before anything else.
When you read the guide, look for these points:
- The weight band the pack is made for, and whether your dog still sits within it.
- Whether the guide includes a higher starting phase, and how many weeks it lasts.
- The maintenance amount, and when the guide says to move to it.
- How many days the pack should last at the correct dose.
Here is a practical point many owners miss. If you stop when the first pack runs out, or cut the dose early to make a pack last longer, you may not have completed the starting phase at all. It is an easy thing to do, especially when budgets are tight, and nothing to feel bad about.
Before deciding anything has not worked, count the weeks your dog has genuinely had the full amount on the label.
Common reasons a supplement can feel like it is not working
These are sensible explanations rather than guaranteed causes. Work through them calmly, one at a time.
1. Not enough time, or an incomplete starting phase
If the label gives a higher starting dose for the first few weeks, judging the product after a week or two, or before that phase is finished, may be premature. Joint supplements are made for steady, long-term daily use, not a quick turnaround.
2. A dose or size mismatch
Joint supplements are usually dosed by weight band. A dog who has gained or lost weight, or who is on a pack for the wrong size band, may not be getting the intended amount. Weigh your dog again and check the pack against the result.
3. Inconsistent dosing
Missed days, a tablet quietly spat out under the sofa, or a fishy capsule being refused can all reduce what your dog really receives. Ask yourself honestly whether the full dose is being eaten every day.
4. Expectations that are too big
A joint supplement supports the joints. It is not a painkiller, and it is not designed to produce a quick, dramatic change. Small shifts, such as an easier rise from the bed or a slightly longer walk, are very easy to miss without a record.
5. The rest of the plan is missing
Joint comfort is usually best supported by a combined approach: pain relief where a vet prescribes it, changes at home, a good diet, weight management and suitable exercise. A supplement on its own, for an overweight dog on slippery floors, is unlikely to be enough.
6. Something else is going on
Stiffness, limping and reluctance to move have many possible causes, and some need a veterinary diagnosis that no supplement can replace. If things are getting worse despite supplementation, the priority is a vet check, not more waiting.
7. Quality and labelling
It is always sensible to read labels carefully, buy from reputable sources and favour manufacturers who are open about what is in their products. If you are unsure whether a pack is genuine or in date, check with the retailer or your vet practice.
Quick check: what to look at first
| Possible reason | What to check | Next step |
|---|---|---|
| Too early | Weeks of the full amount given, as set out on the label | Complete the programme on the label before judging |
| Wrong amount | Current weight against the pack's weight band | Reweigh and follow the label for your dog's size |
| Doses missed or refused | Is every capsule actually eaten? | Ask your vet or pharmacist about giving it, and do not change the dose yourself |
| Plan incomplete | Weight, flooring, exercise pattern | Make home and routine changes |
| Another cause | Is stiffness worsening or is there pain? | Book a vet check |
For guidance only, not a diagnosis.
Practical steps you can take this week
- Check the dose. Reweigh your dog, match the pack to the weight band and follow the starting and maintenance steps on the label.
- Check the timeline. Count the weeks of the full amount, and hold off judging until that period is complete.
- Keep a simple diary. Note good and bad days, how easily your dog gets up, stairs, jumping into the car, walk length and whether they are slow after rest. Short videos of walking and rising are very helpful for your vet too.
- Make sure it is being eaten. If the fishy taste is putting your dog off, ask your vet or pharmacist for advice on giving it.
- Look at weight. Extra weight puts more load on joints, and a vet or vet nurse can score body condition and suggest a feeding plan.
- Adjust the home. Rugs or non-slip mats on smooth floors, a ramp for the car or sofa, a thick supportive bed and short, regular walks can all help.
- Keep exercise steady. Avoid weekend bursts and repeated ball-chasing or jumping if your dog is stiff afterwards, and ask your vet what suits your individual dog.
- Do not stack products blindly. Several joint products together can duplicate ingredients, so tell your vet everything your dog takes, including any prescribed medicines.
- Book a vet check if there is no improvement or things are getting worse. Always ask your vet before combining a supplement with any medication.
When to see a vet rather than wait
Some signs call for veterinary advice rather than more time on a supplement. Think of them as a simple traffic light.
How urgent is what you are seeing?
Mild, steady stiffness
Slow to rise after rest but otherwise comfortable. Keep your diary, check dose and timeline, and mention it at the next routine appointment.
Stiffness getting worse or no change
No improvement after a fair trial of the full programme, reluctance on stairs or jumping, restlessness at night, licking a joint or a dip in appetite. Book a vet appointment.
Sudden or severe signs
Not putting weight on a leg, yelping or snapping when touched, a hot or swollen joint, weak or dragging back legs, or collapse. Contact your vet straight away.
A few other situations are worth a call too: accidents indoors or difficulty posturing to toilet, rapid weight change, or a dog on prescribed medicine when you are thinking of changing anything. Older dogs, large breeds and breeds prone to joint problems benefit from regular check-ups.
If you are thinking of switching
Some owners understandably want to compare formulas. No product suits every dog and none replaces veterinary care, so keep expectations realistic. Here is a fair, factual look at how Synoquin EFA and MedPaw Hip & Joint Chews Max differ.
Format
Synoquin EFA is a tablet or capsule. MedPaw Hip & Joint Chews Max is a daily soft chew, which may suit dogs who dislike capsules, though every dog is different.
Ingredients
Both contain glucosamine, chondroitin and zinc. MedPaw also includes MSM, green-lipped mussel, hyaluronic acid, Boswellia serrata and vitamins C and E. Synoquin lists vitamin C but not vitamin E. Its omega-3 comes from krill oil, whereas MedPaw's omega-3 comes from green-lipped mussel and flax seed. MedPaw is made with rapeseed oil and glycerine.
Guarantee
MedPaw has a 60-day money-back guarantee, and Subscribe & Save is available. Synoquin's guarantee is not stated.
Feeding
The feeding approaches differ, so always follow the label of whichever product you are using. Synoquin's amounts depend on the version and your dog's weight, as set out on its pack. For MedPaw it is the standard amount doubled for the first three weeks: 1 chew a day up to 4kg, 2 for 5 to 17kg and 2 to 3 for 18kg and over, with 2 to 3 months of daily use recommended.
If you do switch, try not to assume it will bring a different result. It is sensible to speak to your vet first, and to change one thing at a time so you can judge any difference properly.
The calm way to look at it
"Not working" often really means "not yet" or "not the whole plan". Check the dose, the time given, how consistently it is eaten and your dog's weight before drawing conclusions. Keep a diary, make the home easier on those joints and take your notes to your vet.
Above all, please do not delay a vet visit if your dog seems to be in obvious pain or is getting worse. A supplement can support healthy joints as part of a plan, and your vet can help you build the right one for your dog.
How long does Synoquin take to work?
There is no set timeframe that suits every dog, and joint supplements are designed for steady, long-term daily use rather than a quick change. The best guide is the feeding instructions on the pack, so count the weeks your dog has genuinely had the full amount, including any higher starting phase. If you are unsure whether you have given it for long enough, your vet can advise.
Could I be giving my dog the wrong dose of Synoquin?
It is possible, as joint supplements are usually dosed by weight band and a dog's weight can change. Reweigh your dog, check the figure against the weight band on your pack, and follow the starting and maintenance steps on the label. If the pack is for a different size of dog, ask your vet or the retailer which version suits yours.
My dog will not eat Synoquin. What can I do?
Synoquin contains krill oil, which can smell and taste fishy, and some fussy dogs refuse it. A tablet or capsule that is spat out or left behind means your dog is not getting the full dose. Speak to your vet or pharmacist about how best to give it, and do not change the dose yourself.
When should I see a vet instead of waiting for Synoquin to work?
Book a vet appointment if stiffness is getting worse, there has been no change after a fair trial of the full programme, or your dog is reluctant on stairs, restless at night or licking a joint. Contact your vet straight away for sudden or severe signs such as not putting weight on a leg, yelping when touched or a hot, swollen joint. A supplement is a complementary feed and cannot replace a veterinary diagnosis.
How does MedPaw Hip & Joint Chews Max differ from Synoquin EFA?
Synoquin EFA is a tablet or capsule containing glucosamine, chondroitin and krill oil, plus vitamin C and zinc. MedPaw Hip & Joint Chews Max is a daily soft chew with glucosamine, chondroitin, MSM, green-lipped mussel, hyaluronic acid and Boswellia serrata, with omega-3 from green-lipped mussel and flax seed. MedPaw has a 60-day money-back guarantee, whereas Synoquin's guarantee is not stated, so check each pack label and speak to your vet before switching.
How much MedPaw would a 20kg dog have each day?
For dogs of 18kg and over the label says 2 to 3 chews a day, doubled for the first three weeks, so a 20kg dog would have 4 to 6 chews a day at the start. After that it is 2 to 3 chews a day, with 2 to 3 months of daily use recommended. A tub holds 60 chews, so it lasts about 10 to 15 days at the starting amount and 20 to 30 days at the maintenance amount.


