Slower Walks, Heavier Breathing: 5 Reasons His Aging Heart Needs Pawprint Protocol
A murmur “just mentioned” at his last checkup. A tired heart takes the small things first. Here is what you can do for his aging heart every single day.
The walk that ends at the corner now. The cough at 2 a.m. You sit down beside him on the kitchen floor and count his breaths. Everyone calls it old age. Something in you keeps asking about his heart: the one muscle that has not taken a night off since the day he was born.
Pawprint Protocol is daily support for the heart that never gets a day off: a liposomal liquid with NMN, NAD+, CoQ10 and resveratrol that goes on the food he already eats, built around the cellular energy his heart runs on and healthy circulation. Here are five reasons it belongs in his daily routine.
Is His Heart Working Harder Than It Should?
A tired heart rarely announces itself. It shows up as small changes you explain away as age, until the vet says “murmur” and you replay every walk you cut short. Here is what owners notice.
Lies down, panting Heavy breathing at rest Awake at night
- Tires early on walks, or lies down and won’t go onThe loop around the block is now to the corner and back. Some days he stops, lowers himself onto the pavement and you wait with him.
- Breathes fast or heavy while he sleeps or restsYou catch yourself watching his side go in and out. Counting.
- Coughs at night, or after lying downThe dry cough at 2 a.m. that you put down to his throat.
- Can’t settle at nightUp, down, a new spot, up again. Neither of you sleeps.
- Wobbles, goes weak or faints after excitementThe greeting at the door ends with his legs going soft.
- Plays less and sleeps moreThe ball stays in the basket. He watches the leash and doesn’t get up.
- A murmur was “just mentioned” at his senior checkupThen nothing. You have been listening to his breathing ever since.
Coughing, breathing that has gone fast or heavy, tiring on exercise, restlessness, fainting: these are the signs a heart in trouble gets named for. [1][2]
If you nodded at two or more, the heart behind it deserves daily support.
Since the signs started, you have been working his whole day around his heart: the shorter loop, the pause at the corner, the evenings in, the ramp to the car. Heart murmur. Mitral valve disease. An enlarged heart. The names owners dread hearing at a senior checkup.
You are not failing him. You are carrying it for him.
Right now, you are making his world smaller to go easy on his heart.
Here is something worth knowing: the heart that is tiring runs on an energy supply, and that is the part you can support every day, from his dinner bowl.
Rest and Shorter Walks Make His World Smaller. Pawprint Protocol Is Built to Support the Heart Behind It.
What most owners do
Rest and shorter walks
Asks less of his heart, from the outside.
What Pawprint Protocol is built for
The energy supply behind every beat
Daily support for the cellular energy his heart runs on, and for healthy circulation.
Most of what owners do on their own for a tired heart has one job: ask less of it. Rest. A shorter loop. Wait and see. It gets him through today, from the outside, and it quietly makes his world smaller.
Pawprint Protocol is built for the other side of it. It supplies NMN, a building block in the NAD+ pathway, together with NAD+, CoQ10 and resveratrol, in one liposomal liquid: daily support for the energy supply his heart runs on and for healthy circulation.
Resting his heart and supporting his heart are two different jobs. Most owners are only doing the first.
1. It Supports the Energy Behind Every Beat: His Heart Has Never Taken a Day Off
Think of what that heart does. In people, the heart turns over about 6 kg of ATP, the cell’s energy currency, every single day [4], and its muscle cells are among the most mitochondria-packed in the body [5]. Now look at what a long day can leave him with.
Those mitochondria run on a helper molecule called NAD+, and in a mouse study the hearts of old mice held less of it than the hearts of young ones [6]. CoQ10 is another molecule they run on, and Reason 2 covers it.
Pawprint Protocol supplies NMN, a building block in the NAD+ pathway, every day, on his dinner: daily support for the cellular energy his heart runs on. Rest is the part you can see. The energy supply is the part Protocol is built to support.
2. Four Ingredients for the Aging Heart and Its Blood Vessels
One liquid. Four ingredients: NMN, NAD+, CoQ10 and resveratrol. The heart does not work alone: in a study of old mice, the carotid artery relaxed less well than in young mice [7]. Two of the four ingredients, NMN and resveratrol, are studied for the lining of the blood vessels. The liquid is liposomal: built to be absorbed, not just swallowed.
NMNLead active
A building block in the NAD+ pathway. In old mice, eight weeks of NMN in their drinking water restored the blood vessels’ ability to relax and eased the stiffness of the aorta [7].
NAD+The helper molecule
The helper molecule that cells, heart cells included, use to turn food into energy. NMN is a building block in the pathway that makes it, and Protocol supplies both.
CoQ10Where the heart holds it
In people, CoQ10 is found at its highest levels in the heart, the kidney and the liver, among the tissues measured [8].
ResveratrolThe blood-vessel lining
A plant compound studied for its effect on the blood-vessel lining. In cell-culture and rodent studies, resveratrol has been shown to increase nitric oxide production in the cells that line blood vessels, the signal that tells a vessel to relax [9].
Pawprint Protocol Daily Heart Energy Support For Senior Dogs
TRY IT 90 DAYS, MONEY BACK3. Trusted by 100,000+ Customers Across Pawprint Lab
When his world is getting smaller, you stop trusting glossy labels. So here is what other owners of slowing-down dogs wrote on a public review site, word for word.
100,000+ customers across Pawprint Lab
Real dogs, real routines
Dogs and their people, shared by Pawprint Protocol creators.
Dropper bottle in hand, Rottweiler at her side Bowl down at dinner time Dropper over the bowl, then dinner
Written on Trustpilot
I started using Pawprint Liquid supplement for my 11-year-old Mini Schnauzer a little over two months ago, and I’m so glad I did. … Since she’s been taking Pawprint her vitality has returned, and she’s active again. I can truly notice a difference. …
… Beau is 7 and was already slowing down, having trouble getting up, and gaining weight. … We are headed into month 3 and today he brought me his Frisbee for the first time in over a year and jumped for it. …
… Now the product is good it has helped my 10-year-old dog walk a little better and we've only been on it for 30 days so for a small Improvement I was very pleased. I would recommend.
4. What Owners Watch for in the First 90 Days of Daily Heart Support
Give a heart the time it deserves. We recommend at least 3 months of consistent use, so think of the first 90 days as one plan.
Before you start, pick the three things you already watch: the walk (how far before he stops), the nights (how often he wakes, coughs or gets up) and the breathing at rest (count his sleeping breaths for one minute and write the number down). Counting a sleeping dog’s breaths for one minute is a home check the MSD Veterinary Manual describes for dogs with heart failure [2]. Healthy adult dogs asleep at home breathe about 13 times a minute on average [10].
These are the places owners watch for the good news: longer walks, more play, calmer nights and steadier breathing at rest. Write down where each one stands tonight, so Day 30 and Day 90 are measured against his own numbers. The 90-day money-back guarantee covers the whole 90 days.
Day 7: Start the Log
This week is only about the routine, until the dropper on his dinner is as automatic as filling the bowl.
What to watch: how he takes it. Write down tonight’s walk, night and breathing count with the date, so Day 30 has something to be compared with.
Day 30: Look Back
A month of dinners. Reread your notes beside Day 7 and ask the three questions you started with: how far did the walk go before he stopped, how was the night, what was the count? You are watching for the small things: a longer sniff at the corner, a quieter hour at night, a steadier count.
What to watch: the same three markers.
Day 90: The Full Window
Ninety days of dinners. Put your Day 7 notes beside today’s. Look for the walk you used to take, the ball out of the basket, a night you both slept through. This is the window we recommend, and the guarantee covers every day of it.
What to watch: the same three markers you wrote down on Day 7.
5. Easy for a Tired Dog: Drops on the Dinner He Already Eats
A tired dog doesn’t need a harder routine. Add the dropper to the wet food or kibble he already eats, or give it directly by mouth. No pills to hide, no chews to bargain over: a routine you dread is a routine you drop. Made in the USA with domestic and imported ingredients, and third-party lab tested.
Daily dose by weight, on his food
| His weight | Droppers a day |
|---|---|
| Under 22 lb | 1 dropper |
| 22 to 55 lb | 2 droppers |
| 55 to 88 lb | 3 droppers |
| 88+ lb | 4 droppers |
Can he take it with his heart medicine? Protocol is a liquid that goes on his dinner, a daily extra, never a swap for anything he takes now. Bring the bottle to his next checkup so his vet can see the label.
90-day money-back guarantee: return even an empty bottleEmail us within 90 days of delivery. Subscribe & Save 25% and free shipping apply to every subscription order.
Think back to the end of that walk: him down on the floor beside you, you counting.
You can’t make him young, and you can’t give his heart a night off. You can support it, every single day. And every week you wait is another week of cut-short walks and counted breaths.
His heart has never taken a day off. Start tonight: order now, and the first dinner after the bottle arrives is his first dose. Subscribe & Save 25%, free shipping and the 90-day money-back guarantee are waiting just below.
ORDER HIS FIRST BOTTLE TONIGHTSubscribe & Save 25% + Free Shipping
References
- [1] Keene BW et al. ACVIM consensus guidelines, myxomatous mitral valve disease in dogs. J Vet Intern Med 2019;33:1127-1140. PMID 30974015. (dogs)
- [2] MSD Veterinary Manual (dog owners). Heart failure in dogs. merckvetmanual.com. (dogs)
- [3] Chetboul V et al. Resting heArt and respIratory rates in dogs in their natural environment: new insights from a long-term, international, prospective study in a COhort … Front Vet Sci 2025;12:1667355. PMID 41030684. (dogs; our estimate is derived from it: about 78.5 beats a minute in the first year, about 59 for ages 1 to 10, about 69 for dogs 10 and older)
- [4] Watson WD et al. A mitochondrial basis for heart failure progression. Cardiovasc Drugs Ther 2024;38:1161-1171. PMID 38878138. (review; human heart)
- [5] Murphy E et al. Mitochondrial function, biology, and role in disease: AHA scientific statement. Circ Res 2016;118:1960-1991. PMID 27126807. (review)
- [6] Carpenter BJ et al. NAD+ controls circadian rhythmicity during cardiac aging. Commun Biol 2026;9:476. PMID 41813966. (mice)
- [7] de Picciotto NE et al. Aging Cell 2016;15:522-530. PMID 26970090. (mice)
- [8] Aberg F et al. Distribution and redox state of ubiquinones in rat and human tissues. Arch Biochem Biophys 1992;295:230-234. PMID 1586151. (rat, human)
- [9] Li H et al. Resveratrol and vascular function. Int J Mol Sci 2019;20:2155. PMID 31052341. (review: cells and rodents)
- [10] Rishniw M et al. Sleeping respiratory rates in apparently healthy adult dogs. Res Vet Sci 2012;93:965-969. PMID 22240295. (dogs)
Reviews quoted on this page, read on Oct 13, 2026: Pawprint Lab on Trustpilot
Each study is labelled with the species it was done in.