He hears the cupboard open and he’s already gone.

You know the routine. The capsule goes in the cheese. The cheese goes in the bowl. He eats the cheese, and somehow — you still don’t know how — the capsule is sitting on the floor, clean and dry.

So you switch. Peanut butter. A spoon of yogurt. The powder stirred through his dinner until you can’t see it. That works about four days. Then he starts eating around it, and on the fifth he sniffs the bowl and walks away from the whole meal.

And here’s the part that stings: you tried it yourself. A taste on your finger, to find out what he was objecting to. One owner put it plainly — “I tried the food before and after adding the supplement, and it is disgusting.”

Now look at the bottle you bought four months ago. It’s still more than half full.

That isn’t a dog who didn’t respond. That’s a dog who never took it.

Nobody talks about this part, because it doesn’t feel like a product problem. It feels like a you problem — like other people’s dogs just eat what they’re given. They don’t. Refusal is one of the plainest reasons a supplement does nothing, and it happens long before any ingredient gets near him.

There’s a reason the format decides this — and it isn’t the formula.

• You hide it in cheese, peanut butter or yogurt — and you do it every single day
• He eats the topping and leaves the capsule on the floor
• You’ve switched flavours or brands because he stopped falling for the last one
• He eats around the powder, or won’t touch the bowl once it’s stirred in
• You’ve tasted it yourself to work out what he’s objecting to
• You’ve started skipping days because the fight isn’t worth it
• The bottle you opened months ago is still more than half full

If three or more of those landed, this is the ordinary version of the problem, not the rare one.

Here’s the step that gets skipped. A supplement has two jobs, and they happen in order. The second one is what every label argues about — what the ingredients do once they’re inside him. The first one is simpler, and nobody sells it: he has to take it.

Powders and capsules were designed for the shelf, not for his nose. A powder changes the smell and texture of the whole bowl, so a dog who objects isn’t objecting to the powder — he’s objecting to dinner. A capsule can be found and spat out, and dogs get better at that with practice. A chew works right up until he’s bored of the flavour.

So the bottle finishes half full, and everyone concludes the ingredients didn’t work. That conclusion skipped a step.

A prescription left on the counter is not medicine. It is paperwork.

Nothing in a bottle can do anything from inside the bottle.

One caveat, because refusal isn’t always about taste. A dog who suddenly stops eating, drops food he used to love, chews on one side, or loses weight is telling you something different — and that’s a vet visit, not a supplement question. If his appetite changed quickly, or he’s off his actual food and not just the powder, see your vet first.

Most owners reading this have already spent the money. Two bottles, maybe four. A chew that worked for a fortnight. A powder that went in the bin with most of it still in the tub.

And somewhere in there you decided the problem was you. You didn’t stick with it. You picked the wrong one.

None of that is true, and the honest explanation is duller than self-blame: the product was designed to be swallowed, and your dog was never consulted.

That matters more than it sounds, because of what sits underneath it. Muscle, brain and heart cells are packed with mitochondria — tiny power plants that turn food into usable energy [1]. They run on a helper molecule called NAD+, which in people is widely reported to fall with age, though researchers still argue about how universal that is [2].

In studies on aging mice, an enzyme called CD38 climbs with age and drains that supply faster [3]. That part hasn’t been studied in dogs yet.

The point is that this is daily and cumulative. A cell doesn’t care what the label promised. It cares what actually arrived today, and again tomorrow.

Which is why a dose he refuses on Tuesday isn’t a small setback. It’s a zero. And four zeros a week is most of the week.

Pawprint Protocol was built by owners who kept finding half-full bottles in the cupboard and decided to solve that part first.

Working with veterinary advisors, they made two decisions that sound small and aren’t.

The first was the format — a liquid in a dropper bottle. You lift his lip and squeeze, and it’s over in about two seconds — before he’s decided whether he has an opinion. No capsule to find, no powder changing the smell of his dinner, no treat he has to be talked into. Prefer it on his food? That works too — kibble, raw, fresh or home-cooked. But you don’t have to hide anything, and that’s the difference.

The second was liposomal delivery. Each active is wrapped in a tiny fat-based shell that shields it on the way through his system, so it arrives intact instead of breaking down first. High absorption, in a format he’ll actually take.

The lead active is NMN — the building block cells use to make NAD+, and the only active here with published dog research behind it. Oral NMN has been through a subacute toxicity study that dosed beagles and found it well tolerated [4] — a different product, not this one. Be clear what that is: a safety study. The NAD+ readings in that paper came from mice, not the beagles — so it says the ingredient has been fed to dogs and studied, not that it is proven to do anything. And no published study has tested Pawprint Protocol itself.

And the objection we hear most: “he’s the pickiest dog in the land, he’ll find a way.” Maybe. But there’s nothing to find — two seconds and a dropper, done before the negotiating starts.

Owners tell us the first thing they notice isn’t in the dog at all. It’s that they stopped buying cheese.

Walk the supplement aisle and every label argues about ingredients. More of this, a newer form of that, a longer name than the bottle beside it. None of it matters if the bowl comes back full.

Pawprint Protocol starts one step earlier — with a format your dog doesn’t get a vote on — and then puts four actives in it:

• NMN: The building block cells use to make NAD+, the helper molecule the energy system runs on. This is the hero, and the only one here with published dog research behind it.
• NAD+: Included on the same pathway, supporting the cellular energy system directly.
• Resveratrol: A plant compound studied alongside NAD+ in the cell’s energy and repair signalling.
• CoQ10: Sits inside the mitochondria, where energy actually gets made.

The honest summary is that this is the pathway worth supporting — and that support only counts on the days he takes it.

✔ A liquid you give straight to him — no pills, no powder, nothing to hide
✔ Liposomal delivery — built to be absorbed, not just swallowed
✔ Supports the cellular energy that naturally declines with age
✔ Works alongside any food — kibble, raw, fresh or home-cooked

Made for dogs 7 and up. Individual results may vary.

You’ll know whether the format works on night one — that part isn’t a waiting game, and it’s the one supplement question that gets answered in about two seconds. What comes after it is slower and quieter. Here’s the pattern owners describe most often, roughly in the order they describe it. Individual results may vary.

There’s no ritual to it. You lift his lip, squeeze the dropper, and it’s done before he’s worked out anything happened. No cheese, no crouching on the kitchen floor, no standing over the bowl. Owners tell us the strangest part of the first week is how much shorter the evening got. Individual results may vary.

This is the first thing you can actually measure. The level in the bottle drops on schedule, because no dose got skipped, spat out or thrown away. For a lot of owners that’s new — a bottle that actually gets used up. Individual results may vary.

The dose moves into the same drawer as the lead and the flea treatment — a thing you do without thinking. He stops backing off when you pick the bottle up, because nothing he dislikes ever followed it. Owners often mention he seems a bit more himself in the evenings. Individual results may vary.

For most families this is the one they can’t put a date on: the cheese came off the shopping list weeks ago and nobody remembers when.

Three months in, the job changes from starting to keeping. NAD+ keeps declining with age whether or not the bottle is open, so the dogs who hold their ground are the ones who stay on it — and staying on it is a great deal easier when there’s nothing left to fight about.

Individual results may vary.

The bottle in your cupboard isn’t evidence that supplements don’t work for your dog. It’s evidence that this one never got past his nose.

That part is fixable tonight, and it doesn’t take a better formula or a firmer hand. It takes a dropper and about two seconds.

Individual results may vary.

Reviews are unedited excerpts from verified Trustpilot reviews of Pawprint Lab. They describe those owners’ own experiences with the product over their own timeframes, and are not accounts of the acceptance points made above. Individual results may vary.

[1] Chistiakov DA et al. Mitochondrial Aging and Age-Related Dysfunction of Mitochondria. BioMed Research International, 2014. Review; this has not been studied in dogs. PMID 24818134.

[2] Peluso A et al. Age-Dependent Decline of NAD+ — Universal Truth or Confounded Consensus? Nutrients, 2021. Review; this has not been studied in dogs. PMID 35010977.

[3] Camacho-Pereira J et al. CD38 Dictates Age-Related NAD Decline and Mitochondrial Dysfunction Through an SIRT3-Dependent Mechanism. Cell Metabolism, 2016. Mouse study. PMID 27304511.

[4] You Y et al. Subacute Toxicity Study of Nicotinamide Mononucleotide via Oral Administration. Frontiers in Pharmacology, 2020. Safety study in beagles; NAD+ was measured in mice, not in dogs. PMID 33384603.