Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Open-Mouth Breathing in Dogs: When Is It a Problem? Vet-Reviewed Facts

Share

close up of dog opening its mouth

Panting is normal behavior that all dogs do because they are hot, are trying to catch their breath after a vigorous run in the park, or are stressed or excited. But what if your dog is panting when there’s no reason for it? Is this a sign that your dog is having trouble breathing?

If a dog is open-mouth breathing when it seems as though they shouldn’t be, it is possibly a medical emergency that must be attended to by a veterinarian.

Let’s look at what might cause a dog to have trouble breathing and when you should seek veterinarian help.

divider single dog paw oct 2024

What Is Open-Mouth Breathing?

Open-mouth breathing can be as simple as a dog panting, or it might be heavy breathing due to breathing problems. The respiration process for dogs involves the nose, mouth, throat, trachea (windpipe), and lungs. Respiration sends oxygen-rich blood throughout the dog’s body and helps remove carbon dioxide.

Breathing also helps regulate the dog’s internal temperature, which is why they pant after they’ve worked hard. The harder they pant, the hotter they are or the more they have exerted themselves. But when the dog is resting, they will resort to breathing through their nose. In fact, panting is what enables dogs to lose heat effectively, since they don’t sweat through their skin the way that we do. They can sweat through their paws but this isn’t much use when trying to cool off quickly.

When a dog pants, air is rapidly inhaled, humidified and exhaled.  This quick movement of air causes moisture along the airways and in the lungs to evaporate which has a cooling effect.

Pit Bull Terrier mixed breed dog panting
Image Credit: Mary Swift, Shutterstock

What Are the Signs of Open-Mouth Breathing Issues in Dogs?

A panting dog is quite normal under the right circumstances. But if your dog hasn’t been exercising, if it isn’t hot outside, and if they aren’t stressed or excited yet they are breathing hard, speak to your vet.

This is even more critical if the following signs accompany the open-mouth breathing:

  • Eye discharge
  • Nose discharge
  • Lethargy
  • Coughing
  • Gums being pale, gray, or purple/blue
  • Collapse
  • Weakness
  • High respiratory rate while resting
  • Bruising
  • Bleeding

Along with the labored breathing, these are signs of a potential underlying injury or illness. A few of the conditions with these signs can be life threatening.

If your dog is these signs, we suggest you speak to a vet.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

What Are the Causes of Open-Mouth Breathing?

There are several causes, other than heat, exertion and stress that can result in open-mouth breathing in dogs.  These include:

  • Pain: Dogs experiencing pain might pant and breathe heavier than usual.
  • Heartworm disease: Heartworms (Dirofilaria immitis) infest the dog’s heart and obstruct the blood vessels within the lungs. The arteries in the lungs can experience scarring and fluid can build up, making breathing labored and difficult.  Right-sided congestive heart failure can eventually result. Lungworms can also cause lung damage and labored breathing.
  • Left-sided congestive heart failure: There are a number of causes of left-sided congestive heart failure in dogs, but the most common cause is Mitral Valve Insufficiency, where the valve that separates the atrium and ventricle on the left side of the heart isn’t working properly.  This means that every time the heart contracts, some blood that is meant to be pumped around the body is regurgitated back into the atrium.  In turn this leads to an accumulation of fluid in the lungs, causing breathing difficulties, exercise intolerance and a higher than normal resting respiratory rate.
  • Bronchitis: Bronchitis can lead to heavy breathing due to chronic inflammation or decreased flexibility in the lungs and airways.
  • Pneumonia: Pneumonia can result from a bacterial, viral, or fungal infection or inflammation in the lungs. The signs of pneumonia are lethargy, fever, lack of appetite, nasal and eye discharge, coughing, and labored breathing.
  • Pulmonary hypertension: Pulmonary hypertension is when the small capillaries in the lungs experience high blood pressure which can lead to an enlarged heart (and subsequent heart failure) and low oxygen transfer.  Signs of this may include heavy breathing, coughing, fainting, or death.
  • Heatstroke: Heatstroke is a medical emergency and requires immediate attention! It is vital that you seek the closest emergency clinic if you suspect that your dog might be suffering from heatstroke.
  • Cushing’s disease: Cushing’s disease is a disease in which a dog’s adrenal glands produce too much cortisol, which is the main stress hormone.  The main visible signs of dogs with Cushing’s disease are  urination, thirst, and excessive

Veterinary by listening to a Golden Retriever dog in his clinic
Image Credit: 135pixels, Shutterstock

How Do I Care for a Dog With Open-Mouth Breathing?

This entirely depends on the condition causing the open-mouth breathing, and there are several potential causes. Your veterinarian will need to run tests, which can include:

  • Physical exam
  • Blood tests
  • Pulse oximetry to measure how much oxygen is in the blood
  • Fecal analysis
  • Chest X-ray
  • Heart ultrasound (echocardiography)

Depending on the results, further tests might be warranted:

  • Bronchoscopy, which checks the airways
  • Broncho-alveolar lavage – sampling fluid from inside the lungs
  • CT scan, to check for issues with the airways and lung tissues

Following these tests, your veterinarian should be able to give you a good idea about the cause/s behind your dog’s breathing difficulties. In many cases, they will be able to offer you treatment to help improve your dog’s quality of life or treat your dog fully.

If the open-mouth breathing is due to your dog overheating, you must get them to a cooler place immediately and ensure that they have water. Lying on cool tiles can help, pouring cool (not cold) water over their armpits, stomach, head and feet is a good idea also.  Ensure a constant supply of cool air is provided and contact your vet.

If you suspect that your dog is excessively panting due to stress or anxiety, you should speak to your vet to find ways of managing their stress levels,  particularly if it’s a common occurrence.

close up of a shih tzu dog panting outside
Image Credit: opalledo, Shutterstock

divider dog paws oct 2024

Frequently Asked Questions (FAQ)

Are There Dog Breeds More Prone to Open-Mouth Breeding?

Unfortunately, flat-faced breeds are prone to brachycephalic airway syndrome, predisposing them to breathing problems.

Dogs like Pugs, Bulldogs, and Shih Tzus are just a few of the breeds with this issue. They should never be heavily exercised, and their time outside must be limited in hot weather.  Ensuring they aren’t overweight is extremely important in helping them to breathe as well as possible.

What Is the Normal Breathing Rate for Dogs?

The breathing rate for a healthy dog is usually between 18-34 breaths a minute, but this depends on the size and weight of the dog. Some dogs breathe a little faster and others a little slower.

If you take your dog’s resting respiratory rate once a month, then you know what it is normally. If you then find it is markedly more than that, it is a good reason to take them for a check up.  If your adult dog takes more than 40 breaths a minute and shows any of the discussed signs, get them to your vet immediately!

How Do I Help My Dog That Is Struggling to Breathe?

The first thing that you need to remember is to stay calm. If you’re panicking and upset, your dog will pick up on it, and this will only make their breathing worse.

  • Make sure your dog is cool
  • Check they aren’t choking on anything, and if you can remove it safely, do.
  • If they are lying on their side, lift them so that they are lying on their sternum.  This allows both lungs to work more efficiently.
  • Check the color of their gums

Call your vet and book an emergency appointment.  If your dog seems to be in real trouble, take them immediately to the closest vet clinic, and call to let them know that you’re on the way.  Time is of the essence when it comes to breathing difficulties.

dog owner talking to vet
Image Credit: SeventyFour, Shutterstock

divider dog paws 3 oct 2024

Conclusion

Open-mouth breathing can be just normal panting behavior, but if it seems to be occurring for no reason, it might be a sign of a more serious issue. Take note if your dog starts behaving differently than expected, which might be a red flag for a problem. If your dog is panting because it’s hot, ensure that they have access to shade and water. Be on the lookout for any worrying signs.

All that said, don’t worry too much and jump to conclusions. You might just have a happy and excited dog on your hands!


Featured Image Credit: KlausHausmann, Pixabay

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Dogster's Digital Magazine is Back!​

Dogster Magazine Cover June 2026

Vet-approved health & behavior advice

Real dog stories & community features

The Organization Helping Pets Feel Safer, Happier, and ‘Fear Free’ – Heroes of the Pet World

For many pet owners, stress during veterinary visits, grooming appointments, travel, or even routine handling can feel like an unavoidable part of life...

Why Some Dogs Treat Mealtime Like Playtime – And When to Pay Attention

Most dogs are reliable eaters. Bowl goes down, food disappears. So when a dog starts batting kibble across the kitchen floor, tossing pieces...

Major Win for Dogs: Ontario Becomes the Final Province to Ban Ear Cropping and Debarking

​​Ontario has approved new animal welfare regulations that will prohibit elective ear cropping and devocalization (debarking) procedures in dogs from January 1, 2027....

Dogster’s Weekly Photo Contest Winners: Most Adorable Puppy (June 8, 2026)

Every week our team gets the privilege of sorting through our readers photos to choose what dogs will win this weeks contest! See...

More related

Why Do Dogs Wag Their Tails? 6 Vet Reviewed Reasons

Most people assume that dogs will wag their tails when they’re feeling happy. However, dogs actually use their tails to communicate and express...

How Long Do Pugs Live? Average Lifespan, Vet-Reviewed Data & Care Guide

Pugs are easily one of the most peculiar dogs in the world. They are quirky dogs with flat faces and there is a...

11 Tips for Exercising Your Senior Dog – Vet-Approved Guide

If you have an old dog that’s not so keen on walks or you are unsure whether your regular routine is too intense...

Is It True That Dogs Only See in Black and White? Facts & FAQ

As children, we’re told things by family members and friends that we instantly believe as fact. Some of these tales reveal themselves over...

Keep reading

Ollie Fresh Dog Food Review 2026: Pros, Cons & Final Verdict

Ollie Pets delivers fresh premium dog food straight to your door. All the recipes were crafted by experts in the field and contain very nutrient-dense ingredients. If you’re looking to make mealtimes more convenient, you’ll want to consider Ollie. Once...

DOG SAPR OLLIE NEW

How Much Crude Protein Should Be in Dog Food? Vet-Verified Facts & Advice

Finding out how much crude protein should be in dog food, as it turns out, is not an easy question to answer. Let’s explore why. The amount of crude protein that should be in dog food varies. Several variables need...

man buying pet food in the store

11 Best Canned & Wet Puppy Foods in 2026 – Reviews & Top Picks

Bringing home a new puppy can be an overwhelming experience; you are still getting to know their unique personality, how to look after them, and most importantly, learning what to feed them! The quality of the food you choose to...

jack russell terier puppy eating food from bowl

Senior Dog Food vs Regular: The Differences, Pros & Cons

As dog owners know, the food that we feed our pups is essential to keeping them healthy. When our dogs start getting older, their bodies change, and so do their nutritional needs. After your dog reached a certain age (which...

Dogster_Senior vs Regular Dog Food

What Human Foods Can I Feed My Diabetic Dog? 6 Vet-Approved Options

Dogs can get diabetes just like humans can. It typically happens when they’re older, but if your pooch isn’t in good health, it can happen at any time. Providing your dog with a quality diet and ensuring that they get...

dog eating carrot

Can Dogs Eat Carne Asada? Vet Reviewed Facts & FAQ

You may be familiar with the phrase “puppy dog eyes.” That is why saying “no” to a dog is next to impossible when they want something, whether they want to play, get up on the couch with you, or eat...

Can Dogs Eat_carne asada

Are Dogs Carnivores or Omnivores? What Research Suggests

If you have a dog, you know that there are few things that they like more than pieces of meat, but they also like to steal just about any other kind of food off the table, causing many people to...

close up of a dog eating from the bowl

Sundays for Dogs Food Review 2026: Our Expert’s Opinion

Sundays dog food takes a different approach to the fresh dog food craze that is becoming more common in the pet food industry. This company uses fresh and human-grade ingredients, but the food has a different look: it doesn’t look...

Dogster_Sundays for Dogs Food Review

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Dogster Email Newsletter