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Go to a vet now if the night-time panting comes with blue, grey or brick-red gums, a swollen belly, retching without bringing anything up, an inability to lie down, collapse, or a sleeping breathing rate consistently over 30 breaths a minute. Those are heart, airway or bloat signs, and none of them wait until morning.
The short answer: a dog panting at night in a cool house, with no exercise to explain it, is almost always one of eight things — and three of them are the ones that matter. Pain, anxiety, and a heart or airway problem account for most night-time panting in adult and senior dogs; the rest are a warm room, cognitive change, Cushing's disease, a medication side effect, or needing to go out. The first thing to do is not guess. It is to count their breathing while they sleep — thirty seconds, doubled — because that single number separates "uncomfortable" from "urgent" better than anything else you can check at 2 a.m.
Written by Marc Brannigan, Co-Founder & CEO of HempMy Pet. Last updated 13 October 2026.
Count First: The Sleeping Breathing Rate
Panting and rapid breathing look similar at night and mean very different things. This test tells them apart, and it costs thirty seconds.
Not resting with their eyes open — actually asleep. Watch the chest. One rise and fall is one breath. Count for thirty seconds and double it. Check it two or three times over an hour and write the numbers down.
That is the sleeping range VCA's cardiology guidance gives for healthy dogs and for dogs with well-managed heart disease. If your dog pants while awake but sleeps at 20 breaths a minute, the heart and lungs are very unlikely to be the problem.
A sleeping rate that stays above 30 is abnormal and is the single earliest home-measurable sign that fluid is building around the lungs. Over 40, or with any of the emergency signs above, that is tonight, not Monday.
The full method is on the VCA home breathing-rate page. Our general panting guide uses the awake-at-rest version of the same test.
The Eight Causes, Side by Side
What you see in the middle column, and in the right column the one detail that points at this cause rather than the others.
| Cause | What it looks like at night | The tell |
|---|---|---|
| 1. Too warm | Panting that starts after they settle on a bed, near a radiator, under a duvet, or in a room that holds the day's heat. | It stops when they move to the tile floor. Thick-coated, overweight and flat-faced dogs first. |
| 2. Pain | Panting plus shifting, repositioning, circling the bed, getting up and lying down again, a hunched or stiff posture. | They cannot get comfortable, and it is worst getting up. Joint pain is the most common missed cause in dogs over seven. |
| 3. Anxiety or stress | Panting with pacing, clinginess, trembling, drooling, hiding, or staring at the door. Often a trigger — a storm, fireworks, a change in the house, being alone. | It tracks the trigger and the body language says fear — tucked tail, flat ears, whale eye. |
| 4. Cognitive change | Senior dog, fine by day, pants and paces after dark; stares at walls, gets stuck in corners, vocalises at nothing. | Confusion, not just discomfort, and it peaks at dusk. See sundowners in dogs. |
| 5. Heart disease | Panting or fast breathing that does not settle when they lie down; coughing, especially at night or on rising; reluctance to lie flat; tiring on walks. | Sleeping breathing rate over 30. This is the one the count catches. |
| 6. Airway or lung problem | Noisy, effortful breathing; coughing; gagging; worse in flat-faced breeds; may follow a cold or kennel cough. | You can hear it — snoring, rasping, honking — and the belly is working to breathe. |
| 7. Cushing's disease | Panting at rest plus drinking and urinating far more, a pot-bellied look, thinning coat, muscle loss. Middle-aged and older dogs. | The water bowl. If you are refilling it much more than you used to, mention it to your vet. |
| 8. Medication | Panting that started after a new prescription — prednisone and other steroids are the classic one; some pain and anxiety drugs too. | It arrived with the pills. Panting is a well-known side effect of steroids; see our prednisone guide. |
A ninth, undramatic cause: they need to go out. If the panting ends at the door, you have your answer. Two causes can run together — a dog with sore hips who is also afraid of the storm will pant harder for both.
Heat, fear and a full bladder stop when the cause stops. Pain, heart and airway panting continue no matter what you change — and that is the group to take seriously.
Why Senior Dogs Pant at Night in Particular
If your dog is over seven and this is new, the list gets shorter and more specific.
Pain is first. Older dogs are prone to osteoarthritis, dental disease and other chronic discomfort, and they pant more at night because there is nothing to distract them from it. The giveaway is the pattern on rising: joint discomfort is worst in the first thirty seconds on their feet and eases as they move. Our guide to the early signs and five stages of arthritis lists what to look for long before a dog is visibly stiff — most owners miss the first two stages entirely.
Heart is second, and it is the one to rule out properly. Leaky heart valves weaken with age, and the earliest sign owners can actually measure at home is the sleeping breathing rate above. If it is consistently over 30, book a vet visit this week regardless of anything else on this page.
Cognitive change is third. A senior dog whose sleep–wake cycle has flipped — sleeping hard all day, up and panting and pacing after dark — may be sundowning, which is the night-time face of canine cognitive dysfunction. It is common and badly under-diagnosed, and it is a diagnosis of exclusion: pain, bladder problems and failing eyesight look almost identical after dark. We go through the whole rule-out list in Old Dog Restless at Night.
Anxiety rises with age too. As sight and hearing fade, an old dog feels less sure of the house at night, and a dog who was never clingy may start panting beside your bed. This is real, and it is also the one group where a calming supplement has any place at all.
The Eight Night-Time Causes in Senior Dogs →
What to Do Tonight
In the order worth trying, assuming the emergency signs are absent and the sleeping rate is under 30.
- Cool the room. Open a window, move the bed off the carpet, take the blanket off. If the panting stops in ten minutes, that was it.
- Take them out. A full bladder in an old dog is an underrated cause of 2 a.m. panting.
- Count the sleeping rate once they settle, and write it down with the time. You will want it either way.
- Look at the body language. Fear looks like fear — tucked tail, flat ears, hiding. Pain looks like restlessness — up, down, circling, a stiff rise.
- Be boring. An anxious dog takes cues from you. Low voice, normal behaviour, no fuss.
- Do not give human medication, and do not give a sedative you have not discussed with your vet.
- Keep a three-night log — when it starts, what they do first, what ends it, how long it lasts. It turns "he pants sometimes" into a pattern a vet can act on.
Where Hemp Fits — and Where It Doesn't
We make hemp products for dogs, so we are going to be precise here. Of the eight causes, hemp belongs in two, and it has no place in the other six.
This is where the canine evidence actually sits. All five published trials in the 2023 systematic review were osteoarthritis trials, four of five positive, including our own 90-day university study. If the night panting is pain-pattern panting in an older dog, a joint-comfort plan is worth discussing with your vet, and full-spectrum hemp is a reasonable part of one.
Storm nights, fireworks, a new house. The canine evidence for stress is thinner than the industry implies — we say so plainly in hemp and CBD for dog anxiety — but it is one legitimate tool among several, and timing matters more than amount: it goes in 30 to 60 minutes before a predictable trigger, not once the dog is already panting.
No role. A dog with a sleeping rate over 30 needs a cardiac workup; a dog drinking the bowl dry needs bloodwork; a dog panting on prednisone needs a conversation about the prednisone. And there is no published canine trial of CBD for cognitive dysfunction. A supplement in any of these cases delays the thing that would actually help.
If you do use it: serving works from body weight — the serving guide has the chart — and if your dog takes any medication, including a heart drug, read what the canine research shows about combining them and talk to your vet first. Hemp can change how quickly the body clears other drugs.
If it turns out to be the joints or the storms, this is where owners start
250mg Hemp Seed Oil
Up to about 40 lbs
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1,000mg Hemp Seed Oil
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Large Dog Hemp Treats
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Grown on our own Colorado farm, third-party tested every batch, and the same full-spectrum extract used in our 90-day university trial. Serving by weight →
Side effects are mostly mild — drowsiness, loose stool, and a liver-enzyme change seen in three of the five published trials. Every published finding is in hemp and CBD side effects in dogs.
When to Call the Vet
Go now if:
- Gums are blue, grey, pale or brick red
- Sleeping breathing rate is consistently over 30, or over 40 at any point
- They cannot lie down, or sit with elbows out and neck extended to breathe
- The belly is swollen or hard, or they are retching without producing anything
- Collapse, severe weakness, or panting that is getting worse by the hour
Book an appointment this week if:
- It has happened more than a few nights and nothing you change stops it
- They are drinking or urinating noticeably more
- There is a new cough, especially at night or on rising
- It started after a new medication
- They are stiff on rising, hesitant on stairs, or slow to lie down
For an owner-facing overview of when panting is normal and when it is not, Dogs Trust has a clear summary, and the Texas Veterinary Medical Foundation explains the cortisol mechanism behind pain and stress panting.
Frequently Asked Questions
What are the first signs of heart failure in dogs?
The earliest sign most owners can detect at home is a sleeping breathing rate that stays above 30 breaths a minute — count the chest for thirty seconds while the dog is asleep and double it. After that: a cough, often worse at night or when getting up; tiring faster on walks; reluctance to lie flat; and in later stages a swollen belly. A new heart murmur at a routine check-up often comes before any of these. If the sleeping rate is high, see a vet this week.
Why is my senior dog panting at night but not during the day?
Usually because there is nothing at night to distract them from discomfort. Joint pain, the most common cause in dogs over seven, is felt most when lying still and is worst on rising. Cognitive change is the other daytime-fine, night-time-not pattern — confusion and pacing that peak after dark. And an old dog's anxiety rises at night as failing sight and hearing make the house less certain. Count the sleeping breathing rate first to rule the heart in or out, then look at how they get up.
Why is my dog panting in the car?
Most often stress or motion sickness, and the two reinforce each other — a dog who feels sick learns to dread the car. Signs of nausea are lip-licking, drooling and swallowing; signs of fear are a tucked tail, trembling and trying to climb into the footwell. Heat is the other cause, and cars warm fast. We looked at what a controlled car-travel study found in keeping dogs calm on the road.
What is the 3-3-3 rule for dogs with anxiety?
It is an adoption guideline, not a treatment: roughly three days for a newly rehomed dog to decompress, three weeks to learn the routine, and three months to feel at home. It is useful for understanding why a new dog pants and paces at night in the first weeks. It does not apply to an established dog whose night-time panting is new — that needs the rule-out list above.
Can anxiety cause a dog to pant at night?
Yes, and it is one of the three most common causes in a cool house. Fear raises cortisol, which raises body temperature and breathing rate, so an anxious dog pants with no heat to explain it. The tell is body language — tucked tail, flat ears, pacing, hiding, clinginess — and usually a trigger you can name. Remove the trigger where you can, give them a small enclosed space they choose, stay calm yourself, and if it is a predictable event, any calming aid goes in ahead of time.
Does CBD help a dog panting at night?
Only if the cause is one hemp has evidence for. In dogs, that is joint discomfort — the strongest canine evidence by a wide margin — and, more cautiously, stress with an identifiable trigger. It has no role in heart disease, airway problems, Cushing's, overheating, medication side effects or cognitive dysfunction, and using it there delays the thing that would help. Work out the cause first; the sleeping breathing count is the fastest way to start.
Is it normal for a dog to pant while sleeping?
Brief fast breathing during dreams is normal — paws twitching, a few quick breaths, then back to slow sleep. Sustained panting or a sleeping rate that stays above 30 breaths a minute is not, and is the pattern that points at the heart or lungs. If you are unsure which you are seeing, count it three times over an hour and film thirty seconds for your vet.
Why is my dog panting and restless at night?
Panting plus restlessness — up, down, circling, pacing — is the pain pattern more often than the anxiety pattern, especially in an older dog, and it is worth separating from panting alone. Pain-restlessness is worst on rising and the dog never quite settles; anxiety-restlessness has a trigger and fearful body language; cognitive restlessness looks like confusion. Our guide to night-time restlessness in old dogs has the full eight-cause table.
The Short Version
A dog panting at night in a cool house is usually pain, anxiety, or a heart or airway problem — with heat, cognitive change, Cushing's, medication and a full bladder making up the rest. Count the sleeping breathing rate first: 15 to 30 is normal, consistently over 30 is a vet visit this week, and over 40 or with any emergency sign is tonight. Then cool the room, take them out, and watch how they get up.
Hemp belongs in two of the eight — joint discomfort, where the evidence is strongest, and trigger-based fear, where it is thinner — and nowhere else.
Hemp for Hip & Joint Mobility → Shop Calming Support
Why Is My Dog Panting · Old Dog Restless at Night · Sundowners in Dogs · Arthritis in Dogs · Serving by Weight
Marc co-founded HempMy Pet in 2016 with his wife Natalie, the company's COO. HempMy Pet breeds its own hemp genetics, grows them on its certified-organic Colorado farm, and formulates every batch in-house under human-grade standards — seed to sale, nothing sourced overseas. Every batch is third-party tested and the certificates of analysis are published. More about us.
HempMy Pet ran its own 90-day study of 37 dogs with chronic joint discomfort. Of the 32 that completed it, 30 (93%) showed a benefit, and 94% of owners reported their dog's quality of life had improved. It was overseen by Dr. Robin Downing, DVM, MS of the Downing Center for Animal Pain Management, with Lori Kogan, Ph.D. and Peter W. Hellyer, DVM of Colorado State University's College of Veterinary Medicine & Biomedical Sciences, and published in the Journal of the American Holistic Veterinary Medical Association. Read the methodology.
Why Dr. Downing: in 2005 she became only the third veterinarian in the world credentialed as a Diplomate of the American Academy of Pain Management. She founded the International Veterinary Academy of Pain Management, is a Diplomate of the ACVSMR, a Certified Veterinary Pain Practitioner and a Certified Canine Rehabilitation Practitioner, and was the AVMA's 2020 Bustad Companion Animal Veterinarian of the Year. Chronic joint pain is her life's work. Read the published paper (PDF).
This article is general information for dog owners, not veterinary advice. It is reviewed and updated as new peer-reviewed evidence is published, and where the evidence is thin or negative we say so.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. This article is general information, not veterinary advice. If your dog is unwell, contact your veterinarian.
