It usually starts at night.

He gets up at three in the morning and walks. Not to the door, not to the water bowl — just walks. Hall, kitchen, back again. Sometimes he stands in the corner facing the wall and you have to go and turn him around.

Then it shows up in daylight. He stands in a doorway like he's forgotten which side he was headed for. He gets stuck behind the open door of the pantry, on the wrong side, waiting. He barks at nothing for a minute and then stops, and you can't tell what it was.

And the one that actually stings: you come home and there's a beat before he recognizes you. Half a second where he's looking at you and figuring it out. Then the tail goes and he's himself again.

One owner described it as “he's still in there, he's just buffering.” That's the most accurate description we've heard.

Most people write this off as him going deaf, or getting a bit confused, or just being old. Owners say it to each other constantly — “she's going deaf and a bit confused, but she's fine.”

Veterinarians look at the same list of signs and see something with a name and a mechanism behind it. It has to do with fuel — specifically, what the aging brain does when its usual fuel gets harder to use.

Before anything else: these signs need a vet. Not instead of one.

• Pacing or wandering at night, often in the small hours, with no destination
• Standing in corners, behind doors, or facing a wall and needing to be turned around
• A pause before recognizing you, or before responding to a name he's known for years
• Sleeping much more in the day and much less at night — the schedule flipped
• Staring at nothing, or at a wall, for stretches at a time
• Accidents in the house from a dog who was reliable for a decade
• Less interest in greeting people he used to rush to the door for

Vets group those signs under canine cognitive dysfunction, or CCD. It is a real, diagnosable condition and it is your veterinarian's to assess, not a website's and not a supplement's. If several of those describe your dog, book the appointment. Some of them overlap with other medical problems that need real treatment.

What's useful to understand is the fuel part, because it explains the pattern owners find so strange.

The brain is the hungriest organ in the body. It runs almost entirely on glucose, and it needs a steady supply every second it's awake. Research in aging dogs shows the senior brain gets less efficient at using that glucose — vets call it glucose hypometabolism. The fuel is there. The brain just has a harder time getting at it.

Underneath that sits the same machinery that ages everywhere else. Brain cells are dense with mitochondria — the tiny power plants that turn fuel into usable energy — and those get less efficient with age too.

A brain that's short on usable energy doesn't shut off. It buffers. It takes longer to place a familiar face. It loses the thread halfway through a doorway.

He's still in there. The lights just dimmed.

Ask around about night pacing and you'll get a list of coping tips. Nightlights. A stricter routine. A crate by the bed. Blackout curtains. More walks during the day so he sleeps through.

Some of that genuinely helps, and good vets recommend it. But every item on that list manages the behavior. None of them touches the energy problem sitting underneath it.

So here's what's underneath, in plain terms.

Every cell in the body — brain cells very much included — runs on a helper molecule called NAD+. It's involved in hundreds of everyday reactions, and turning fuel into usable energy is the biggest one. NAD+ naturally declines with age.

And older cells don't just make less of it. They lose it faster, because an enzyme called CD38 climbs as an animal gets older and drains the supply. Less coming in, more leaking out.

That's a supply problem, and supply problems have supply-side answers. Cells build NAD+ from a building block called NMN. Oral NMN has been studied in dogs, where it raised NAD+ levels.

We want to be straight with you about what that does and doesn't mean. Supporting cellular energy is not a treatment for CCD, and nobody should sell it to you that way. What it is: support for the energy system that every cell in an aging dog relies on, brain cells included.

Pawprint Protocol was built by owners of senior dogs who wanted something that worked at the level underneath the symptom list.

Working with veterinary advisors, they built a daily liquid around one job: give cells the building block they use to make NAD+, and deliver it in a form that actually gets absorbed.

The lead active is NMN — the direct building block for NAD+, and the only ingredient in the formula with published dog research behind it.

Then there's the delivery problem, which matters more here than almost anywhere. A lot of what you pour on dinner never makes it in. Stomach acid, first-pass loss in the liver, ingredients that barely dissolve. And a dog who's confused at mealtimes is not a dog who's going to cooperate with a pill.

Pawprint Protocol is a nanoliposomal liquid. Each active is wrapped in a protective layer so it survives the trip — up to 98% absorption. A few drops on whatever he already eats. Nothing to hide in cheese, nothing he has to agree to chew.

It sits alongside whatever your vet has you doing. It doesn't replace any of it.

We're not going to tell you a supplement handles this. Your veterinarian handles this. There are real assessments, real management plans, and in some cases real medication, and none of that is optional because a liquid exists.

What Pawprint Protocol does is work one level below the symptom list — at the cellular energy system that every aging cell depends on. A few drops of liquid on food he already eats, once a day.

Four actives, each with a job:

• NMN: The direct building block cells use to make NAD+, the fuel-helper molecule that naturally declines with age. The hero of the formula, and the one with published dog research behind it.
• NAD+: Included as part of the same pathway, supporting the cellular energy system an aging dog runs on every day.
• Resveratrol: A plant compound studied alongside NAD+ for its role in the cell's energy and repair signaling.
• CoQ10: Sits inside the mitochondria — the tiny power plants in each cell — where fuel actually gets turned into energy.

All four in a nanoliposomal liquid, because an ingredient that doesn't get absorbed is a line on a label, not a dose.

✔ Supports the cellular energy that naturally declines with age
✔ Supports normal cognitive function in senior dogs
✔ Up to 98% absorption — built to be absorbed, not just swallowed
✔ Works alongside any food, and alongside your vet's plan

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

You don't have to wait three months to see anything. Most owners tell us the first changes show up in days to weeks, and they're small and behavioral rather than dramatic. Here's the pattern owners describe most often. Individual results may vary.

Nothing loud. Owners describe it as “he seems more switched on.” A quicker turn when you come through the door. Interest in a toy that's been ignored for months. Getting up on the first try. One owner wrote, “she was just there again.”

This is the stretch owners of night-pacers watch for. What they usually report isn't that the pacing vanished — it's that it got shorter, or it moved from most nights to some nights. Days get a bit more structured on their own. Individual results vary a lot here.

Less about single moments now and more about them repeating. The good day becomes most days. Owners often mention greetings around here — the pause before recognition getting shorter, the tail starting sooner than it had been.

Three months in, the job shifts from noticing changes to keeping them. NAD+ keeps declining with age whether or not anyone is watching, so the dogs who hold their ground are the ones who stay on it.

And this is the point to say the honest thing again: cognitive change in senior dogs is a veterinary matter and it deserves a veterinary plan. Cellular energy support belongs alongside that plan, not in place of it. Keep your appointments. Individual results may vary.

The 3am pacing is not a personality change and it isn't him being difficult. It's an aging brain working harder than it used to for the same result.

You can't argue a dog out of that, and no amount of routine fixes the fuel. What you can do is support the energy system underneath it, every day, while you work the plan your vet gives you.

He's still in there. That has never been in question.

Reviews are unedited excerpts from verified Trustpilot reviews of Pawprint Lab. Individual results may vary.

[1] Pan, Y. et al. Efficacy of a Therapeutic Diet on Dogs With Signs of Cognitive Dysfunction Syndrome. Frontiers in Nutrition, 2018.

[2] Canine Cognitive Dysfunction Syndrome (brain glucose hypometabolism in the aging dog). Purina Institute, Centresquare.

[3] You, J. et al. Subacute Toxicity Study of Nicotinamide Mononucleotide via Oral Administration. Frontiers in Pharmacology, 2020.

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

[5] Mitochondrial Aging and Age-Related Dysfunction of Mitochondria. BioMed Research International, 2014.

[6] Age-Dependent Decline of NAD+ — Universal Truth or Confounded Consensus? Nutrients, 2022.