Panting in a cool, calm room usually means something. Here are the nine most common causes of unexplained panting in dogs and what to do about each one.
Panting is how dogs cool down and how they burn off excitement, so most of the time it means nothing at all. But panting in a cool room, in a calm dog, at rest, is different. That's a body working harder than the situation calls for, and it's usually telling you something.
Here are the nine most common reasons, and what to do about each.
The emergency signs to look out for :
Get to a vet immediately, not in the morning, if the panting comes with pale, white, blue, grey, or brick-red gums; visible effort to breathe with flared nostrils or elbows held away from the body; retching that produces nothing alongside a swollen, hard belly; collapse or stumbling; or new noisy, raspy, honking breathing.
If none of that applies, work through the list below.
1. Pain
The most common cause, and the one owners almost never guess first. Dogs don't cry when they hurt, they pant. Because panting reads as "hot" to us, it goes unrecognised for months.
What it looks like: panting at rest, worse at night once the distractions of the day are gone, often with restlessness like getting up, circling, resettling. Frequently paired with lying down more slowly or choosing the hard floor over the bed.
What to do: book a vet exam and mention pain explicitly. In a middle-aged or older dog, joint pain is the likeliest source, and it's very treatable once identified. Our guides on nighttime restlessness and stiffness after lying down describe the same picture from other angles.
2. Anxiety or stress
What it looks like: panting tied to a trigger like fireworks, a storm, the car, visitors, a change at home. Usually accompanied by pinned ears, a tucked tail, lip licking, yawning, or pacing, and it stops when the trigger does.
What to do: manage the trigger and give her a quiet, enclosed place to retreat to. If the panting has no obvious trigger, or doesn't switch off afterwards, treat it as medical rather than behavioural.
3. Cushing's disease
What it looks like: heavy panting plus dramatically increased drinking and urination, a pot-bellied appearance, thinning coat, and a bigger appetite. Most common in middle-aged and older dogs.
What to do: ask your vet about testing. It's diagnosed on bloodwork and it's manageable but it's regularly written off as normal ageing for a year or more before anyone checks.
4. Heart disease
What it looks like: panting with a soft cough, especially at night or shortly after lying down, tiring quickly on walks, and an elevated breathing rate at rest.
What to do: count her resting breathing rate (see below) and take the numbers to your vet. Chest X-rays and a heart workup are the usual next step.
5. Laryngeal paralysis
What it looks like: noisy, raspy breathing that worsens with heat and exercise.The key to identify — a change in the bark. Hoarser, weaker, or just different. Very common in older Labradors and other large breeds.
What to do: get it assessed sooner rather than later. Affected dogs can't cool themselves properly and are at real risk in warm weather or during exertion.
6. Other airway problems
What it looks like: a goose-honk cough in small breeds points toward a collapsing trachea. In flat-faced breeds, loud, constant, year-round panting usually reflects brachycephalic airway syndrome.
What to do: both are structural and both are manageable, but neither improves on its own. Weight control makes a measurable difference to how badly they affect a dog.
7. Medication side effects
What it looks like: panting that started within a couple of weeks of a new prescription. Steroids like prednisone are the usual culprit; some opioid pain medications and sedatives do it too.
What to do: tell your vet, and don't stop or adjust the dose yourself. Often it's an expected effect that can be managed, sometimes with a dose change.
8. Anemia
What it looks like: panting with pale gums, low energy, and reduced stamina. Fewer red blood cells means less oxygen delivered, so the dog breathes harder to compensate.
What to do: this needs prompt bloodwork. Causes range from tick-borne disease to internal bleeding, and the underlying reason matters more than the anemia itself.
9. Cognitive decline
What it looks like: an older dog panting, pacing, and seeming disoriented at night, sometimes staring at walls or getting stuck in corners.
What to do: raise it with your vet. Canine dementia frequently coexists with pain, and separating the two changes the treatment plan. Our post on the grumpy or withdrawn senior dog covers that overlap.
The 30-second test to do tonight
This is the most useful thing you can bring to an appointment, and almost no owner knows to do it.
While your dog is genuinely asleep and settled, not dreaming, not panting, watch her chest and count each rise and fall as one breath for 30 seconds. Double it.
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Under 30 breaths per minute is normal for most dogs; many sleep in the low twenties
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Consistently above 35–40 while truly asleep is abnormal and warrants a vet visit, especially if there's any heart history
Do it a few nights running and write the numbers down. A trend is worth far more than one reading, and it's hard data rather than an impression.
What else to record before the vet
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When it happens: night only, after walks, all day, or tied to specific events
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What stops it, if anything
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What else changed in the same window like drinking, appetite, urination, energy, bark, cough, weight, willingness to climb stairs
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Any new medication
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A video, ideally 30 seconds at its worst. Dogs are famously fine in the exam room, and a clip cuts through that faster than any description
Lead with the pattern when you get there. "She pants for two hours every night starting around eleven, her resting rate is 38, and she's been slow on the stairs for two months" tells your vet more in ten seconds than a page of guesses.
FAQs
Is panting always a sign of pain in dogs?
No. Heat, excitement, stress, and exercise all cause it normally. Panting at rest in a cool room, particularly at night, is the version worth investigating.
Why does my dog pant at night but not during the day?
Distraction fades in the evening and discomfort becomes more noticeable once a dog is still. Night-only panting is a classic presentation of chronic pain, and also appears in cognitive decline and heart disease.
What's a normal breathing rate for a sleeping dog?
Usually under 30 breaths per minute. Consistently above 35–40 while genuinely asleep should be checked.
Can anxiety alone cause heavy panting?
Yes, and it's common. Anxiety panting tracks a trigger and eases once it passes. Panting with no trigger and no off-switch needs a medical look.
My dog started panting after starting prednisone; is that normal?
It's a well-recognised effect of steroids. Tell your vet, but don't stop or change the dose on your own.
Educational content only, not a substitute for veterinary diagnosis. If your dog is in respiratory distress, seek emergency care immediately. These statements have not been evaluated by the Food and Drug Administration. PCQ Pet is a dietary supplement and is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary.