A dog that is struggling to breathe needs a vet right away. Cornell's veterinary college calls respiratory distress a serious medical emergency, and the Royal Veterinary College says every animal with it must be treated as one.1,2 Warning signs include breathing with the mouth open while resting, standing with the elbows out and neck stretched, the belly pushing hard with each breath, noisy breathing, and blue or purple gums.1,2,3 Normal panting after exercise or in the heat settles within minutes of rest. A healthy dog at rest or asleep usually takes fewer than 30 breaths a minute.4,5,6 On the way to the vet, keep your dog calm and cool, and don't muzzle him.1,7
Go to an emergency vet now if your dog:
- Is breathing with the mouth open while resting, or can't settle and keeps getting up and lying down1,3
- Stands with elbows out and neck stretched, or refuses to lie down2,3
- Has blue, purple or very pale gums or tongue1,8
- Is using the belly to push air, or makes wheezing, snoring or whistling sounds he doesn't normally make1,2
- Collapses, or has a resting breathing rate staying well above 30 to 40 a minute3,5
Panting, Fast Breathing or Labored Breathing?
| Type | What it looks like | Is it normal? |
|---|---|---|
| Panting | Open-mouth, rapid, shallow breathing to cool down | Normal after exercise, heat or excitement, as long as it settles within about 5 to 10 minutes of rest4,9 |
| Fast breathing (tachypnea) | More breaths per minute than usual while resting or asleep, mouth may be closed | Not normal if it stays above about 30 at rest5,1 |
| Labored breathing (dyspnea) | Visible effort: belly pushing, chest heaving, elbows out, neck stretched, nostrils flaring, noise | Never normal; this is the emergency sign10,9,2 |
See dog panting and dog breathing fast for more on those.
Normal Breathing Rate and How to Count It
Most healthy dogs breathe about 15 to 30 times a minute at rest.1,5,3 Asleep, the rate is lower: in a study of 114 healthy dogs, average sleeping rates were about 13 to 15 breaths a minute, and no dog averaged more than 23.6 Dogs with heart disease that hasn't yet caused symptoms usually sleep at fewer than 25 breaths a minute too.11
- Wait until your dog is sound asleep or resting quietly, not panting, dreaming or twitching.12,5
- Count each rise and fall of the chest as one breath, for 30 seconds, and double it.5,12
- Count at about the same time each day for a week to learn your dog's normal.12,5
- If it's high, recount a few times over the next couple of hours before calling.5
- Write it in a notebook or a phone app and bring the log to your vet.
For dogs with heart disease, this simple home check is one of the best early warnings of heart failure. Veterinary cardiology guidelines say a rise above your dog's own baseline is the most useful sign.13 VCA considers rates consistently above 30 abnormal, and Tufts advises calling your vet above 35.5,10 See congestive heart failure in dogs.
Causes of Trouble Breathing
Vets often narrow down the cause by where the problem is. Noise when breathing in usually points to the upper airway; effort breathing out with a wheeze points to the lower airways; and rapid, shallow breathing can point to fluid or air around the lungs.14,15
| Where | Common causes | Notes |
|---|---|---|
| Nose, throat and windpipe | Brachycephalic airway syndrome, laryngeal paralysis, collapsing trachea, something stuck in the throat | Flat-faced breeds struggle most in heat and with excitement.16 Laryngeal paralysis affects older large dogs and starts with harsh panting and a hoarse bark.17,3 Collapsing trachea causes a honking cough in toy breeds.18 |
| Lungs and airways | Pneumonia, fluid from heart failure, bronchitis, lung tumors, lungworm | Aspiration pneumonia is more likely after vomiting, regurgitation or anesthesia.19,20,2,3 |
| Around the lungs | Fluid or blood in the chest, air in the chest (pneumothorax), diaphragmatic hernia | Often after being hit by a car. Air in the chest is an emergency.21,22 |
| Outside the lungs | Heat stroke, pain, anemia, shock, fluid around the heart, hormonal or nerve problems | Breathing hard can be a sign of a problem elsewhere in the body.1,2,3 |
See dog wheezing, dog choking and heat stroke in dogs.
What to Do on the Way to the Vet
- Go straight to the nearest emergency vet. Call ahead if someone else can, so the team is ready.1,3
- Keep your dog as calm and still as possible. Stress makes breathing worse.2,23
- Keep him cool, with the car's air conditioning on.1
- Carry a small dog in a box or carrier, and move a large dog on a blanket or board rather than making him walk.24
- If he's weak, let him lie on his chest with his head and neck stretched forward.1
- Don't muzzle a dog that is struggling to breathe, and never put your fingers in his mouth unless he is choking and you can see the object.7,24
- Tell the staff the breathing started at home, since it often changes at the clinic.3
If he stops breathing, start CPR. See dog first aid for other emergencies.
What the Vet Will Do
- Oxygen first, with as little handling as possible. A vet may watch your dog breathe from a distance before touching him.23,14,2
- Sedation to ease panic, which itself makes breathing harder.2,14
- Bedside ultrasound, then chest X-rays once your dog is stable enough.15,14
- Draining fluid or air from around the lungs with a needle (thoracocentesis), which can bring fast relief.2,14
- Treatment for the cause, such as diuretics for heart failure, antibiotics for pneumonia or airway-opening medicines.15
- Severe cases may need a breathing tube, a tracheostomy or a ventilator.2,15
Prognosis
The outlook depends on the cause.2 Many dogs with aspiration pneumonia recover with treatment; one study of 125 dogs found the prognosis good with supportive care.20 Young flat-faced dogs usually do well after airway surgery.16 Heat stroke is serious: about half of dogs in one hospital study died, and delays of more than 90 minutes before treatment raised the risk.25 Fluid around the lungs often carries a guarded outlook, depending on why it formed.21
Related: if your dog is panting but not in distress, the Dog Panting Checker can help you decide how soon to call your vet.
Dog General Diseases and Symptoms QuickLinks
Frequently Asked Questions
Why is my dog breathing heavy while resting?
Heavy breathing at rest isn't normal panting. Common causes include pain, heat, heart failure, lung disease and airway problems. If it doesn't settle within a few minutes, or your dog seems distressed, call your vet.
What is a normal breathing rate for a dog when sleeping?
Usually under 30 breaths a minute, and often 15 to 25. Healthy dogs in one study averaged about 13 to 15 while asleep.
How do I know if my dog is panting or struggling to breathe?
Panting settles with rest and cooling. Struggling to breathe shows effort: belly pushing, elbows out, neck stretched, noisy breaths or blue gums.
When is fast breathing in a dog an emergency?
When it comes with effort, noise, blue or pale gums, collapse, or can't settle, or when a resting rate stays well above 30 to 40 a minute.
What does labored breathing look like in a dog?
Big chest and belly movements, breathing with the mouth open at rest, flared nostrils, elbows held out, the neck stretched forward, and often restlessness.
Can heart failure cause heavy breathing in dogs?
Yes. Fluid builds up in or around the lungs, and a rising sleeping breathing rate is often the first sign. Dogs with heart disease benefit from daily home counts.
What should I do if my dog is having trouble breathing?
Keep him calm and cool, don't muzzle him, and go straight to an emergency vet, calling ahead if you can.
What will the vet do for a dog in respiratory distress?
Give oxygen and calm him first, then use ultrasound and X-rays to find the cause, drain fluid or air if needed, and treat the underlying problem.
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Sources and further reading
This article was written and fact-checked on November 4, 2026 against current veterinary references and specialist guidelines:
- Cornell University Riney Canine Health Center. Recognizing and responding to canine respiratory distress. Cornell University, updated March 2025.
- Royal Veterinary College Emergency Referral Service. Respiratory distress in cats and dogs. RVC, accessed November 2026.
- American Animal Hospital Association. Respiratory distress in pets. AAHA, 2024.
- Maharaj N. Why Do Dogs Pant? American Kennel Club, updated August 2026.
- Hunter T, DVM; Weir M, DVM; Gordon SG, DVM, DACVIM (Cardiology). Home Breathing Rate Evaluation. VCA Animal Hospitals, updated March 2025.
- Rishniw M, et al. Sleeping respiratory rates in apparently healthy adult dogs. Research in Veterinary Science 2012;93(2):965 to 969.
- Textor J, DVM, PhD. What to Do in a Dog or Cat Emergency. MSD Veterinary Manual (pet owner version), December 2025.
- DoveLewis Emergency Animal Hospital. Pet Gum Health: What the Color of Your Pet's Gums Could Mean. DoveLewis, March 2025.
- Kuehn NF, DVM. Introduction to Lung and Airway Disorders of Dogs. Merck Veterinary Manual (pet owner version), updated September 2024.
- Cummings School of Veterinary Medicine at Tufts University. Monitoring Heart Disease Treatment at Home. Tufts University, accessed November 2026.
- Ohad DG, Rishniw M, Ljungvall I, et al. Sleeping and resting respiratory rates in dogs with subclinical heart disease. JAVMA 2013;243:839 to 843.
- Scansen BA, DVM, DACVIM (Cardiology). Home Respiratory Rate Monitoring in Dogs and Cats. Clinician's Brief, 2017.
- Keene BW, Atkins CE, Bonagura JD, et al. ACVIM consensus guidelines for the diagnosis and treatment of myxomatous mitral valve disease in dogs. Journal of Veterinary Internal Medicine, 2019.
- Cole L. Emergency management of dyspnoea. Veterinary Ireland Journal, October 2021.
- Badeski L, VMD. Emergency Handling of, Stabilization of, and Diagnosing the Dyspneic Patient. Angell Animal Medical Center, 2023.
- American College of Veterinary Surgeons. Brachycephalic Syndrome. ACVS, 2023.
- American College of Veterinary Surgeons. Laryngeal Paralysis. ACVS, 2023.
- Kuehn NF, DVM. Tracheal Collapse in Dogs. Merck Veterinary Manual (pet owner version), updated September 2024.
- Kuehn NF, DVM. Pneumonia in Dogs. Merck Veterinary Manual (pet owner version), updated September 2024.
- Clinician's Brief. Retrospective Study of Aspiration Pneumonia (summary of Tart KM, et al., JVECC 2010). Clinician's Brief, 2010.
- Kuehn NF, DVM. Accumulation of Fluid or Air in the Chest Cavity in Dogs. Merck Veterinary Manual (pet owner version), updated September 2024.
- Hauptman J, DVM. Diaphragmatic Hernia in Dogs. Merck Veterinary Manual (pet owner version), updated September 2024.
- Veterinary Focus. Emergency Care of the Patient with Acute Respiratory Distress. Veterinary Focus 20.2, 2010 (IVIS).
- Hunter T, DVM; Williams K, DVM; Llera R, DVM; Ward E, DVM. Emergencies in Dogs. VCA Animal Hospitals, updated February 2024.
- Bruchim Y, Klement E, Saragusty J, et al. Heat stroke in dogs: a retrospective study of 54 cases (1999 to 2004) and analysis of risk factors for death. Journal of Veterinary Internal Medicine 2006;20(1):38 to 46.
About this article
Last updated : new page written using Cornell University, the Royal Veterinary College, AAHA, VCA, Tufts, the Merck Veterinary Manual, ACVS and published research on sleeping respiratory rates.
This page is for general information and is not a substitute for an exam by your veterinarian.
