You walk into the room and your dog is panting hard, tongue out, even though he has just been lying on the rug. No walk, no play, no hot sun — so why is he breathing like he just ran a race? It is a worrying sight, and if you are reading this, you have probably already wondered whether something is wrong.
The good news is that panting is a normal part of how dogs cool down and cope with excitement. Dogs do not sweat through their skin the way people do. Instead, they release heat by breathing fast with their mouth open and tongue out. That is why a healthy dog will pant after a walk, on a warm day, or when he is thrilled to see you come home. But panting can also be a sign that your dog is stressed, in pain, overheated, or struggling with a health problem. This guide covers the most common possible causes and the warning signs that mean it is time to call your vet.
What Normal Panting Looks Like
Normal panting is easy to recognise: mouth open, tongue out, breathing fast but relaxed. His body looks loose, his tail may wag, and he settles down on his own within a few minutes of resting in a cool spot with water nearby. Dogs often pant after exercise, in warm weather, or when excited. Puppies may pant more simply because they are full of energy, and flat-faced breeds such as Bulldogs and Pugs tend to pant more because their shorter airways make breathing harder work. Normal panting should slow down once your dog rests and has a drink.
Possible Cause 1: Heat and Warm Weather
Heat is the most common reason dogs pant. When the temperature rises, your dog pants to release body heat and cool down. This can happen on a summer walk, in a warm house, or after lying in a sunny spot by the window. Dogs are much more sensitive to heat than people, especially if they have a thick coat, are overweight, or are older. Humidity makes it worse, because damp air makes panting less effective at cooling the body. To help, move your dog to a shady or air-conditioned spot, offer fresh cool water, and let him rest. A damp towel on his belly or paws can help. Avoid walking in the hottest part of the day, and always carry water on warm walks. Never leave a dog in a parked car, even for a few minutes — cars heat up dangerously fast.
Possible Cause 2: Exercise and Excitement
If your dog has just been running, playing fetch, or greeting a favourite visitor, heavy panting is completely expected. Exercise raises body temperature, and panting is how the body brings it back down. Excited dogs also pant because of the rush of energy and emotion. After play, give your dog time to calm down in a cool place with water close by, and do not ask him to keep playing while he is still panting hard. Most dogs settle within ten to twenty minutes. Short, regular walks are better than one long, exhausting outing.
Possible Cause 3: Stress, Anxiety, and Fear
Dogs pant when they are nervous, just as people might fidget when anxious. Loud noises, thunderstorms, fireworks, vet visits, car rides, new people, or being left alone can all trigger stress panting. It often looks a little different from normal panting: your dog may pace, yawn, lick his lips, tuck his tail, hide, or follow you from room to room. The panting may start suddenly when the stressful thing appears and ease once it passes. If your dog pants during storms or fireworks, create a calm, safe space — a quiet room, a cosy bed, gentle background music, and your calm presence. For more ideas, see our guide on how to keep your dog calm during fireworks and holiday parties. If anxiety panting happens often, talk to your vet.
Possible Cause 4: Pain or Discomfort
Dogs are good at hiding pain, but panting can be one of the quiet clues they give us. A dog in pain may pant even while lying still, along with restlessness, whimpering, limping, stiffness, or a reluctance to move, jump, or climb stairs. Pain can come from a sore joint, an injury, a stomach upset, dental pain, or recovery after surgery. Older dogs with arthritis may pant more at night or after lying down for a while. If your dog suddenly starts panting for no clear reason and also seems uncomfortable or unlike himself, pain is one possibility worth considering. Never give your dog human painkillers such as ibuprofen or paracetamol, as these can be harmful to dogs. Instead, keep him comfortable, limit strenuous activity, and contact your vet, describing when the panting started and what else changed.
Possible Cause 5: Breathing Problems and Allergies
Some dogs have breathing conditions that make them pant more easily. Short-nosed breeds, dogs with allergies, and dogs with a respiratory infection may breathe noisily, cough, sneeze, or pant with extra effort. You might hear wheezing or a raspy sound, or notice laboured breathing even at rest. Allergies can also play a role: dust, pollen, smoke, strong air fresheners, and cleaning sprays can irritate a dog’s airways. If panting seems worse in certain rooms or seasons, notice what might be different there. If breathing sounds harsh or his gums look pale or bluish, seek veterinary help promptly.
Possible Cause 6: Weight, Age, and Breed
Overweight dogs pant more because carrying extra weight makes every movement harder and cooling down more difficult. Even a short walk can leave an overweight dog puffing. Gradual, vet-guided weight loss through portion control and gentle daily exercise can make a real difference over time. Senior dogs may also pant more, as ageing can bring joint stiffness and changes in how the body handles heat — but new or worsening panting in an older dog is still worth mentioning to your vet. Breed matters too: flat-faced and thick-coated breeds may pant more readily.
Possible Cause 7: Thirst and Dehydration
Panting and thirst often go together. A dog who is hot, has been active, or has not had enough water will pant and seek out water, and may also show a dry nose, dry gums, or less energy than usual. Always keep fresh, clean water available, and refill the bowl through the day. On walks, bring a portable water bottle and bowl, especially in warm weather. Some dogs drink more after meals or play, which is normal. But if your dog suddenly starts drinking much more than usual, or seems thirsty all the time, that change is worth noting. Our guide on why your dog may be drinking so much water suddenly explains the possible causes in more detail. If you suspect dehydration — for example after vomiting or diarrhoea — offer small amounts of water often, and contact your vet if your dog will not drink or seems very weak.
Possible Cause 8: Medication Side Effects
Some medicines can make dogs pant more. Steroid medicines, for example, are known to increase thirst, appetite, and panting in some dogs. If your dog started a new medicine recently and the panting began around the same time, the two may be connected. Never stop a prescribed medicine on your own, even if you suspect it is causing the panting. Instead, call your vet and explain what you have noticed. They can tell you whether the panting is a known side effect, whether the dose needs adjusting, or whether your dog should be checked in person.
Possible Cause 9: Underlying Health Conditions
In some cases, heavy or persistent panting can be linked to a health condition, such as heart disease, lung disease, hormonal conditions like Cushing’s disease, or anaemia. These conditions often come with other signs as well — a cough that will not go away, tiring very quickly, a swollen belly, changes in appetite, or a change in weight. This is not something you can work out at home, and it is not a reason to panic. Many conditions can be managed well once they are found. What matters is noticing the pattern: panting that is new, frequent, heavy, or paired with other changes deserves a vet visit. Keeping a short note of when the panting happens and what else you notice will help your vet enormously.
How to Help a Panting Dog at Home
When your dog is panting, a few simple steps usually help him settle. Move him to a cool, shaded, or air-conditioned spot. Offer fresh water, but do not force him to drink. Let him rest and avoid further exercise until his breathing is back to normal. Place a damp, cool towel on his belly or paws if he is hot, and keep the room calm and quiet if stress seems to be the cause. Most normal panting eases within a few minutes of rest. A dog who pants but is otherwise happy and settled is usually fine; one who seems distressed or unlike himself needs closer attention.
What NOT to Do
- Do not pour ice-cold water over a hot dog or force him into an ice bath. Sudden extreme cold can shock the body. Use cool, not freezing, water and a damp towel instead.
- Do not cover him with a wet towel and leave it on. A soaked towel can trap heat. Use a damp towel, then remove it and let air circulate.
- Do not give human medicines. Painkillers and cold medicines made for people can be dangerous for dogs. Only give medicines your vet has prescribed.
- Do not keep exercising a panting dog. Stop the walk or game and let him rest, even if he seems keen to carry on.
- Do not ignore panting that comes with other warning signs. Heavy panting plus vomiting, collapse, pale gums, or difficulty breathing needs urgent veterinary care.
- Do not leave a panting dog in a hot car or closed, sunlit space. Move him somewhere cool and ventilated straight away.
- Do not punish or scold a dog for panting. Panting is not bad behaviour — it is communication.
When to See a Vet
Most panting is harmless, but some situations need professional help. Contact your vet promptly, or seek emergency care, if you notice: panting that is very heavy, does not slow down with rest, or goes on for a long time for no clear reason; difficulty breathing, wheezing, or gasping; pale, white, or bluish gums; collapse, weakness, vomiting, or diarrhoea alongside the panting; panting after possible heatstroke; panting that is new or much worse than usual, especially in a senior dog; or panting paired with other changes such as loss of appetite, weight loss, excessive thirst, or coughing. If you are ever unsure, call your vet and ask. See also our guide on how often to take your dog to the vet by age.
Frequently Asked Questions
Is it normal for my dog to pant at night?
Some night-time panting can be normal, especially in warm rooms or after a late walk. But regular or heavy panting at night, especially if your dog also paces or cannot settle, is worth mentioning to your vet, as it can be linked to pain, anxiety, or an underlying health issue.
Why is my dog panting and shaking at the same time?
Panting with shaking often points to stress, fear, excitement, or feeling cold — thunderstorms, fireworks, and vet visits commonly cause both. But if the shaking is new, severe, or comes with vomiting, weakness, or behaviour changes, contact your vet.
Do some dog breeds pant more than others?
Yes. Flat-faced breeds such as Bulldogs, Pugs, and French Bulldogs tend to pant more because their airways are shorter and narrower. Thick-coated breeds may also pant more in warm weather, so keep their exercise gentle and always provide shade and water.
Should I worry if my puppy pants a lot?
Puppies often pant because they are excitable and still learning to regulate body temperature, so panting after play is normal. But if a puppy pants heavily at rest, struggles to breathe, coughs, or seems lethargic and off food, contact your vet promptly.
How can I tell if my dog is overheating?
Signs include very heavy, fast panting, drooling, a bright red tongue and gums, weakness, wobbling, vomiting, or collapse. If you suspect overheating, move your dog to a cool place, offer small amounts of cool water, dampen his belly and paws with cool water, and contact your vet straight away, even if he seems to improve.
Conclusion
Panting is one of the main ways your dog talks to you. Most of the time, it is simply his way of cooling down, shaking off excitement, or telling you he is a little nervous. Keep him cool, keep fresh water close, give him calm and comfort when he is stressed, and never hesitate to call your vet when something feels wrong.