# Dog Breathing Hard and Coughing: Causes and Urgency Dog labored breathing and coughing means your dog is working harder than normal to move air while also making a cough sound. This combination can come from a mild airway infection like kennel cough or from a serious problem such as pneumonia, heart disease, or acute respiratory distress. The speed of your dog's decline matters more than the exact diagnosis, so watch for worsening effort, blue gums, or collapse and act fast. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - A dog who is coughing but breathing comfortably at rest can often wait for a same-day or next-day veterinary visit. - A dog who is coughing and also working hard to breathe (wide nostrils, belly effort, elbows out, unable to lie down) needs emergency care now. - Kennel cough is usually mild and self-limiting, but it can progress to bronchopneumonia in puppies or to chronic bronchitis in debilitated adult or aged dogs [1]. - Pneumonia causes labored breathing, a deep cough, lethargy, and loss of appetite, and it needs prompt treatment [2]. - Do not give human cough syrups, pain relievers, or leftover antibiotics. Some are toxic to dogs, and the wrong drug can hide signs your veterinarian needs to see. ## What Labored Breathing With a Cough Looks Like Normal breathing in a resting dog is quiet and easy. You should not see the belly pump, the nostrils flare, or the chest heave. A normal resting respiratory rate for most dogs is under about 30 breaths per minute, though this varies with size, temperature, and excitement. Labored breathing looks different. Your dog may: - Breathe with the mouth open at rest, or breathe through the nose with flared nostrils and a stretched neck (dog breathing through nose labored) - Use the belly muscles to push air out - Sit or stand with elbows pointed out and refuse to lie down - Make a honking, hacking, or gagging sound along with the breathing effort (dog breathing coughing and gagging) - Tire quickly on short walks or stop walking altogether A cough plus labored breathing is a louder signal than a cough alone. A cough by itself often points to the upper airway or a mild irritation. Labored breathing suggests the problem is affecting how well oxygen gets into the blood. ## Main Causes of Dog Labored Breathing and Coughing Many conditions can produce this pair of signs. The table below groups the most common ones and how quickly they usually need care. | Cause | Typical clues | How urgent | |---|---|---| | Kennel cough (infectious tracheobronchitis) | Dry honking cough, often after boarding, daycare, or a vet visit. Dog is otherwise bright and eating. | Same-day to routine visit. Mild and self-limiting in most dogs [1]. | | Pneumonia | Deep cough, lethargy, poor appetite, fever, labored breathing that worsens after exercise [2]. | Same day, or emergency if breathing is hard at rest. | | Heart disease (mitral valve disease) | Older small-breed dog, cough worse at night or with excitement, possible fainting. | Same-day to urgent. Coughing is more likely with severe left atrial enlargement [3]. | | Brachycephalic airway syndrome | Flat-faced breeds (pug, bulldog, Boston terrier) with noisy breathing, snoring, exercise intolerance. | Routine to urgent, depending on severity. | | Aspiration pneumonia | Recent vomiting, regurgitation, or a forced feeding or medication event [2]. | Emergency. | | Acute respiratory distress syndrome (ARDS) | Sudden severe breathing difficulty, gagging, coughing, low oxygen saturation [4][5]. | Emergency. | | Tracheal collapse | Honking cough triggered by leash pulling or excitement, more common in small breeds. | Same-day to urgent. | | Foreign body or mass in the airway | Sudden onset, sometimes after chewing or eating, noisy breathing. | Emergency. | ### Kennel Cough and Other Infectious Causes Kennel cough results from inflammation of the trachea and is caused by several organisms, most often Bordetella bronchiseptica, canine parainfluenza virus, and canine adenovirus 2 [1]. It spreads quickly among dogs housed in close confinement, such as boarding facilities, daycares, and veterinary hospitals [1]. Puppies are more prone to severe disease, and the illness can progress to bronchopneumonia in puppies or chronic bronchitis in debilitated adult or aged dogs [1]. If your dog has labored breathing in the setting of kennel cough, that is a reason to call your veterinarian instead of wait it out. A mild honking cough with normal breathing effort is one thing. A dog who is also working to breathe may be developing pneumonia. ### Pneumonia Pneumonia is inflammation of the lungs and airways that causes breathing difficulty and low blood oxygen [2]. The most common cause is a viral infection of the lower respiratory tract, including canine distemper virus, adenovirus types 1 and 2, canine influenza virus, and parainfluenza virus [2]. These viruses damage the airways and make the lungs vulnerable to bacterial infection. Signs include lethargy, loss of appetite, and a deep cough, along with labored breathing, lip "blowing," and bluish mucous membranes, especially after exercise [2]. Body temperature is often moderately increased [2]. Aspiration pneumonia can follow persistent vomiting, abnormal esophageal movement, or improperly given medications or food [2]. ### Heart Disease Not every coughing dog with heart disease is in heart failure. A study of 352 dogs with myxomatous mitral valve disease found that only severe left atrial enlargement increased the probability of coughing, and congestive heart failure itself was not an independent predictor of coughing [3]. That matters because it means a heart murmur plus a cough does not automatically equal fluid in the lungs. Your veterinarian will use imaging to sort this out. ### Other Serious Causes ARDS is a sudden, severe lung injury that can follow infection, aspiration, or other triggers. One case report described a dog with acute gagging, coughing, and lethargy who had low oxygen saturation and diffuse lung changes consistent with ARDS [4]. Another report described a young dog who developed acute respiratory distress after regurgitation at a boarding facility and did not survive [5]. These are uncommon but show why sudden severe breathing effort deserves immediate care. Brachycephalic dogs can also have hidden upper airway problems. One report described a pug with chronic upper airway obstruction from brachycephalic obstructive airway syndrome who also had intranasal inflammatory polyps causing marked airflow obstruction, and signs improved markedly after surgery [6]. ## Red Flags That Make It an Emergency Go to an emergency clinic now if your dog has any of these: - Breathing that is hard at rest, with the belly pumping or elbows out - Gums that look blue, gray, or pale - Collapse, weakness, or inability to stand - Open-mouth breathing in a dog who normally breathes through the nose - A cough that suddenly becomes constant and severe - Vomiting with labored breathing (dog labored breathing and vomiting) - A known episode of regurgitation or vomiting followed by rapid breathing [5] - Oxygen saturation below 95 percent on a home pulse oximeter, if you have one [4] Do not wait to see if it improves overnight. Respiratory distress in dogs can worsen quickly, and the window for effective treatment is short. ## Safe Things You Can Do at Home While Waiting You cannot treat labored breathing at home, but you can keep your dog stable and avoid making things worse. - Keep your dog calm and quiet. Excitement and exercise increase oxygen demand. - Use a harness instead of a neck collar if your dog has a cough, since pressure on the trachea can trigger coughing. - Offer water in small amounts. Do not force food or medication by mouth if your dog is struggling to breathe. - Count resting breaths per minute while your dog sleeps. Write the number down so you can tell your veterinarian whether it is rising. - Do not give human cough suppressants, decongestants, or pain medications. Some are toxic to dogs, and dosing depends on weight and health. - Do not use a humidifier, steam room, or essential oil diffuser around a dog with breathing difficulty without asking your veterinarian first. - If your dog has a known heart condition, keep a log of coughing episodes, especially at night. If your dog's cough is mostly at night, see [Dog Coughing at Night: Why It Happens and When to Seek Help](/knowledge/veterinary-medicine/vet-visit-decisions/dog-coughing-at-night). If the cough comes on suddenly, see [Why Is My Dog Suddenly Coughing And Gagging](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-suddenly-coughing-and-gagging). ## What Your Veterinarian Will Check and Test Your veterinarian will start with a full physical exam. They will listen to the heart and lungs, check gum color, feel the trachea, and take your dog's temperature and respiratory rate. They will also ask about boarding, daycare, travel, other dogs in the home, and any recent vomiting or regurgitation. Common tests include: - Chest X-rays to look for pneumonia, fluid, masses, or an enlarged heart [2] - Bloodwork to check for infection, organ function, and oxygen-carrying capacity - Pulse oximetry to measure oxygen saturation [4] - Airway sampling or bronchoscopy when a chronic cough needs a definitive diagnosis [7] - Echocardiography when heart disease is suspected [3] - CT or fluoroscopy for certain airway and nasal problems [7][6] Treatment depends on the cause. Bacterial pneumonia needs antibiotics. Heart failure needs cardiac medications. Kennel cough in a stable dog often needs only rest, isolation from other dogs, and time [1]. Chronic cough can often be managed even when a complete cure is not possible, using antimicrobials, anti-inflammatories, bronchodilators, and anti-tussives [7]. ## Prevention and Monitoring - Keep vaccinations current. Bordetella, parainfluenza, and adenovirus vaccines reduce the risk and severity of kennel cough [1]. - Avoid crowded dog settings when your dog is unvaccinated, very young, or elderly. - Ask about vaccine requirements before boarding or daycare. - Monitor resting respiratory rate at home if your dog has heart disease. A rising trend is a reason to call your veterinarian. - Watch for coughing that changes in character, becomes more frequent, or starts waking your dog at night. - If your dog has a flat face, talk to your veterinarian about airway screening before anesthesia or breeding [8]. - Keep a simple log of cough times, triggers, and breathing effort. This helps your veterinarian choose the right tests. For more on cough patterns, see [Why Is My Dog Coughing And Gagging And Wheezing](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-coughing-and-gagging-and-wheezing) and [Dog Coughing: When Is It an Emergency?](/knowledge/veterinary-medicine/vet-visit-decisions/dog-coughing-when-emergency). ## Limitations and When to Contact a Veterinarian This article cannot tell you what is wrong with your specific dog. Only a veterinarian who examines your dog can do that. Individual cases need a veterinarian, and the guidance below is about timing, not diagnosis. Contact your veterinarian the same day if your dog has a new cough with mild breathing changes, is eating but seems tired, or has a cough that started after boarding or daycare. Go to an emergency clinic now if your dog has labored breathing at rest, blue or gray gums, collapse, open-mouth breathing, vomiting with breathing difficulty, or a sudden severe worsening of a cough. Schedule a routine visit if your dog has a long-standing cough that is stable, or if you need to update vaccines before boarding. ## Frequently Asked Questions ### Can kennel cough cause labored breathing? Yes, but labored breathing is not typical of mild kennel cough. Kennel cough is usually a mild, self-limiting disease, though it can progress to bronchopneumonia in puppies or chronic bronchitis in debilitated adult or aged dogs [1]. If your dog with kennel cough is working to breathe, call your veterinarian. ### Is labored breathing in dogs always an emergency? No, but it should always be taken seriously. Mild increases in breathing effort can happen with pain, fever, or anxiety, while true respiratory distress needs immediate care. If you are unsure, call your veterinarian or an emergency clinic and describe what you see. ### Why is my dog breathing hard and coughing at night? Nighttime coughing is common with heart disease and with airway disease. Coughing in dogs with mitral valve disease is more likely when there is severe left atrial enlargement [3]. Keep a log of nighttime episodes and show it to your veterinarian. ### Can I give my dog cough medicine for labored breathing? No. Human cough medicines and other over-the-counter drugs can be toxic to dogs, and the dose depends on your dog's weight and health. Your veterinarian will choose a safe treatment after examining your dog. ### How long does kennel cough last? Kennel cough is usually mild and self-limiting, but the exact duration varies by dog and by which organisms are involved [1]. Puppies and debilitated older dogs may take longer to recover and are at higher risk of complications [1]. If your dog is not improving or is breathing harder, call your veterinarian. ## Related Articles - [Why Is My Dog Coughing And Gagging And Wheezing](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-coughing-and-gagging-and-wheezing) - [Dog Bad Breath Cough](/knowledge/veterinary-medicine/dental-care/dog-bad-breath-cough) - [Why Is My Dog Suddenly Coughing And Gagging](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-suddenly-coughing-and-gagging) - [Dog Coughing: When Is It an Emergency?](/knowledge/veterinary-medicine/vet-visit-decisions/dog-coughing-when-emergency) - [Dog Coughing at Night: Why It Happens and When to Seek Help](/knowledge/veterinary-medicine/vet-visit-decisions/dog-coughing-at-night) - [Why Is My Dog Coughing And Gagging Randomly](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-coughing-and-gagging-randomly) - [Labored Breathing in Dogs: What It Means and When to Worry](/knowledge/veterinary-medicine/symptom-guides/labored-breathing-in-dogs) - [Dog Breathing Problems: Causes and When to Worry](/knowledge/veterinary-medicine/symptom-guides/dog-breathing-problems-causes) - [My Dog's Breathing Seems Weird: When to Worry](/knowledge/veterinary-medicine/symptom-guides/dog-breathing-weird-when-to-worry) - [Bordetella bronchiseptica in Dogs and Cats: Kennel Cough Pathogenesis, Diagnosis, and Control](/knowledge/bacteria/pet-bacteria/bordetella-bronchiseptica-kennel-cough-dogs-cats-diagnosis) ## References 1. [Kennel Cough - Respiratory System](https://www.merckvetmanual.com/respiratory-system/respiratory-diseases-of-small-animals/kennel-cough). Merck Veterinary Manual. 2. [Pneumonia in Dogs - Dog Owners](https://www.merckvetmanual.com/dog-owners/lung-and-airway-disorders-of-dogs/pneumonia-in-dogs). Merck Veterinary Manual. 3. [Severe left atrial enlargement, but not congestive heart failure, increases the probability of coughing in dogs with mitral valve disease](https://pubmed.ncbi.nlm.nih.gov/41135574/). Journal of the American Veterinary Medical Association, 2026. 4. [Acute respiratory distress syndrome associated with a pheochromocytoma in an adult dog](https://pubmed.ncbi.nlm.nih.gov/39091479/). The Canadian veterinary journal = La revue veterinaire canadienne, 2024. 5. [Acute Respiratory Distress Syndrome in a Dog With Canine Respiratory Coronavirus Infection](https://pubmed.ncbi.nlm.nih.gov/42125851/). Journal of veterinary emergency and critical care (San Antonio, Tex. : 2001), 2026. 6. [Intranasal inflammatory polyps associated with brachycephalic obstructive airway syndrome in a pug dog](https://pubmed.ncbi.nlm.nih.gov/42095163/). The Canadian veterinary journal = La revue veterinaire canadienne, 2026. 7. [The Approach to Chronic Cough in Dogs and Cats](https://pubmed.ncbi.nlm.nih.gov/42086413/). The Veterinary clinics of North America. Small animal practice, 2026. 8. [Canine brachycephalic obstructive airway syndrome as a model for studying the effects of obstructive sleep apnea during pregnancy](https://pubmed.ncbi.nlm.nih.gov/42266161/). Animal models and experimental medicine, 2026. ## Further Reading - [Kennel Cough (Infectious Tracheobronchitis) in Dogs - Dog Owners (Merck Veterinary Manual)](https://www.merckvetmanual.com/dog-owners/lung-and-airway-disorders-of-dogs/kennel-cough-infectious-tracheobronchitis-in-dogs) - [American Veterinary Medical Association: First Aid Tips for Pet Owners](https://www.avma.org/resources-tools/pet-owners/emergencycare/first-aid-tips-pet-owners) - [Merck Veterinary Manual: Dog Owners](https://www.merckvetmanual.com/dog-owners)