Most dog supplements are failing your dog. Here's what the science says to do instead.

If you've ever stood in a pet shop aisle staring at a wall of supplements wondering whether any of them actually work, you're not alone, and the fact that you're asking the question probably means you already suspect the answer. The dog supplement market is worth hundreds of millions of pounds, and most of it is built on underdosed ingredients, proprietary blends that hide what's actually in them, and health claims that have run well ahead of the evidence behind them.

This isn't an attack on the industry so much as a reflection of a reality that most dog owners discover too late: buying a supplement doesn't automatically mean your dog is getting what they need, and the gap between what's on the label and what's actually doing anything in the bowl is often wider than most people realise.

So what does actually work?

Walk into any pet shop and you'll find supplements that claim to support joints, others that claim to boost immunity, some that promise a healthier coat, and a handful that claim to do all three at once. What you won't find on most labels is an honest account of how much of each active ingredient is actually in the product, because in most cases it isn't enough to do anything measurable, and the manufacturers know that most buyers won't dig into the research to check.

A trace of glucosamine, a dusting of turmeric, just enough of each ingredient to put it on the label without enough to make any real difference in the bowl. This practice is known in the industry as "fairy dusting," and it is far more widespread in the pet supplement market than most dog owners would be comfortable knowing.

The other significant problem is fragmentation. A dog's health isn't one isolated thing: gut health affects immunity, inflammation affects both joints and cognition, and coat condition is usually a reflection of what's happening internally. Buying five separate supplements to address five separate issues isn't just expensive and inconvenient, it's also inefficient, and most dogs won't comfortably tolerate the volume of powder or capsules involved in trying to cover everything separately.

The ingredients with the strongest evidence base for canine health are not secrets, and they have been studied extensively in both veterinary and human research contexts. The challenge has always been whether anyone would bring them together into a single product at doses that are clinically meaningful, in a form that dogs would actually consume willingly.

Chicory root (inulin) is a prebiotic fibre with strong and consistent evidence for improving gut microbiome balance in dogs, and gut health is foundational to almost everything else because a healthy microbiome improves nutrient absorption, immune response, digestive comfort, and even behavioural mood.

Glucosamine is one of the most studied compounds for joint health in both humans and dogs, stimulating cartilage production and protecting joint tissue from breakdown, with meaningful effects at the right dose and meaningful absence of effect at the underdosed levels found in most supplements.

Turmeric (curcumin) is a natural anti-inflammatory with a substantial and growing body of research behind it, reducing systemic inflammation, supporting joint comfort, and providing antioxidant protection throughout the body.

Hydrolysed collagen supports joint, skin, and coat health through its rich supply of the amino acids glycine and proline, which help maintain cartilage structure and promote skin elasticity over time.

Algae-derived omega-3 (DHA) is essential for brain development, cognitive function, and coat health at every life stage, and sourcing it from algae rather than fish oil makes it both more sustainable and more stable.

Vitamins B, C, and E support immune function, energy metabolism, and cellular protection, and a complete B-vitamin complex in particular is something most dogs on a standard diet are not getting in sufficient quantity.

The question was never really about which ingredients work. It was about whether anyone would put all of them together at effective doses, without fillers, in a format that dogs would actually eat.

CAN9 was developed because the founder couldn't find a supplement they would trust , not one that covered every major area of health in a single product, not one that used ingredients at doses actually backed by the research, and not one made in the UK in a certified facility with full transparency about every ingredient and every dose.

So they built it themselves, working with specialists in pet nutrition and veterinary science and selecting every ingredient based on published research into canine health rather than on what was cheap, available, or impressive-sounding on a label.

The result is 18 active ingredients covering 9 functional benefits in a single daily scoop that can be mixed into whatever your dog already eats, whether that's wet food, dry kibble, or raw, with no proprietary blends, no fillers, and no fairy dusting anywhere in the formula.

"This is not a supplement business. It is a dog health business."
The CAN9 Team

Gut health: chicory root prebiotic fibre feeds beneficial bacteria and keeps the microbiome balanced, and because gut health underpins so much of everything else, this is where the formula starts.

Immune support: vitamin C and a full B-vitamin complex work together to keep your dog's natural defences primed and functioning as they should.

Joint and mobility: glucosamine, hydrolysed collagen, and boswellia work in combination to protect and support joint tissue, helping dogs move more comfortably at every age.

Anti-inflammation: turmeric and boswellia, both supported by real and published research, reduce systemic inflammation throughout the body rather than targeting one isolated area.

Coat, skin, and eyes: DHA omega-3 and vitamin E support skin elasticity, coat condition, and eye health from the inside out rather than through topical treatments.

Cognitive health: DHA supports brain function at every life stage, from the neural development of puppies through to the cognitive maintenance needs of senior dogs.

Energy and metabolism: B vitamins help the body actually convert food into usable energy rather than storing it, which means less sluggishness and more of the dog you know.

Heart and liver health: hawthorn and folic acid support cardiovascular and liver function, the organs doing the quiet, vital work that keeps everything else running.

Dental health: seaweed extract (ascophyllum nodosum) is one of the most well-evidenced natural ingredients for reducing plaque and tartar accumulation over time.

"Tried this on my dog Tito as he's on a specialist diet but as a fussy eater he's not been finishing his new food. All that has changed since I've been adding CAN9 to his food and he now can't get enough of it. Happy Tito and a very happy owner."

"Use this on my 8 month old Parsons Jack Russell's wet food every morning and she licks the bowl clean. Really easy to use and convenient and a great way of getting nutrients to an active dog."

"We gave CAN9 to our pregnant dog Petra and the results have been outstanding. She looks so healthy and her coat is gleaming."

CAN9 is formulated for all breeds, sizes, and life stages including puppies over 12 weeks, adults, and seniors, and it works alongside any diet whether that's kibble, wet food, raw, or mixed feeding. Dosing is straightforward at 5g per 5kg of bodyweight per day using the scoop included inside the pouch.

Try CAN9 today

Your dog doesn't need five different supplements bought from five different places and added to their bowl in five different scoops. They need one formula that has done the work of bringing everything together at doses that actually matter.

If you'd prefer to let your dog try it before committing to a full pouch, a 10g sample providing a full day's dose for a medium dog is available for £3, so you can see how they take to it before buying.