# Why Is My Cat Panting? Causes and When to Worry Panting in cats is not normal the way it is in dogs. When do cats pant? Usually only when they are overheated, stressed, or seriously ill, so open mouth breathing in a cat deserves a closer look. A cat that pants during play on a hot day may simply need to cool down, but a cat that pants at rest, or pants with blue gums or collapse, needs emergency care. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Occasional panting right after intense play or in high heat can be normal, but it should stop within a few minutes of rest and cooling. - Open mouth breathing at rest, or panting that lasts more than a few minutes, is a red flag for heart, lung, airway, or pain problems. - Emergency signs include blue or gray gums, labored breathing with the elbows out, collapse, or a cat that cannot settle. - Never give human medications, and do not try to force water or food into a panting cat. - Call your veterinarian or an emergency clinic the same day for any panting that is new, repeated, or paired with other symptoms. ## What Panting in Cats Looks Like and What Is Normal Panting means rapid, open mouth breathing. You may see the mouth open, the tongue out, the sides moving fast, and sometimes drool or a stretched neck. In dogs this is a cooling system. In cats it is not. Cats normally breathe with their mouths closed, at roughly 20 to 30 breaths per minute at rest. A sleeping or relaxed cat should be quiet and steady. If you can see the belly or chest moving hard, or the cat is sitting with elbows turned out like a chicken, that is labored breathing, not normal panting. Some cats pant briefly after hard play, especially in warm weather or in a cat that is overweight. Kittens and young cats may pant for a minute or two after a chase. This should stop quickly once they rest. If it does not, treat it as a medical sign. Stress can also cause panting. A car ride, a vet visit, a new pet, or a loud storm may make a cat breathe fast with the mouth open. This usually settles when the stressor is gone. If your cat also shakes or hides, see [Cat Shaking and Panting: When to Rush to the Vet](/knowledge/veterinary-medicine/vet-visit-decisions/cat-shaking-and-panting). ## Main Causes of Panting in Cats ### Heat and Overexertion Cats do not sweat much, so heat builds up. A cat in a hot car, a closed room, or direct sun can pant. So can a cat that plays hard. This type is short lived. Move the cat to a cool, quiet place and watch. If the panting stops in a few minutes and the cat acts normal, heat or play is likely the cause. ### Stress and Anxiety Fear triggers fast breathing. A cat at the vet, in a carrier, or around a new animal may pant. The breathing usually slows once the cat feels safe. This is one of the few times panting can be benign, but you still need to rule out pain and illness. ### Heart Disease Heart disease is a common cause of severe breathing trouble in cats. In one study of 258 cats with severe dyspnea, cardiac causes accounted for 25% of cases, and male cats were significantly overrepresented in the cardiac group [1]. Heart disease can cause fluid around the lungs or fluid in the lungs, which makes breathing hard. Cats with heart disease may pant, breathe fast, hide, or stop eating. Some cats with heart disease also have transient myocardial thickening, a reversible condition that can mimic hypertrophic cardiomyopathy and has been linked to stress and inflammation after surgery [2]. ### Lung and Airway Disease Respiratory causes made up 33% of severe dyspnea cases in the same study [1]. This includes asthma, pneumonia, pleural effusion, and infections. Pleural effusion, which is fluid around the lungs, was present in 39% of those cats, with cardiac causes in 38%, respiratory causes such as pyothorax and feline infectious peritonitis in 30%, neoplastic causes in 23%, and traumatic causes in 9% [1]. Cats with lung disease often cough, wheeze, or breathe with effort. ### Fluid Around the Lungs and FIP Feline infectious peritonitis can cause fluid to build up around the lungs. A case report described an 11 year old cat with three weeks of weakness, poor appetite, fast breathing, and trouble breathing, and imaging showed severe bilateral pleural effusion without heart enlargement [3]. The cat's breathing worsened as fluid collected again, and NT-proBNP rose [3]. This shows how quickly fluid can change breathing and why repeat checks matter. ### Pain Pain can make a cat pant. A study of cats after eye surgery found that pain behaviors included a lowered head position, and the duration of that behavior changed with analgesia [4]. Pain from any source, including dental disease, arthritis, or surgery, can raise breathing rate. If your cat pants and also squints, hides, or refuses to move, pain is a real possibility. ### Trauma and Tumors Trauma and cancer each accounted for 21% of severe dyspnea cases in the same 258 cat study [1]. A fall, a car accident, or a fight can cause internal injuries that make breathing hard. Tumors in the chest can also press on the lungs. The median age was 2 years for traumatic causes and 6 years for respiratory causes, which shows that young cats can have emergencies too [1]. ### Airway Obstruction Rarely, a growth or web of tissue can block the airway. One older cat had chronic breathing trouble, noisy breathing, trouble swallowing, and severe weight loss, and imaging found a membranous web at the laryngopharynx causing near complete obstruction [5]. This is uncommon, but it shows that airway blockages can cause long term panting and need imaging to find. | Cause | Typical clues | How urgent | |---|---|---| | Heat or play | Panting only during or right after activity, stops with rest | Monitor, cool down | | Stress | Panting around a trigger, settles when calm | Monitor, reduce stress | | Heart disease | Fast breathing at rest, hiding, not eating, male cat | Emergency if labored | | Lung or airway disease | Cough, wheeze, effort to breathe | Same day to emergency | | Pleural effusion or FIP | Weakness, weight loss, fast breathing, belly or chest looks full | Emergency | | Pain | Squinting, hiding, lowered head, not moving | Same day | | Trauma or tumor | Recent fall or fight, weight loss, lump | Emergency | | Airway obstruction | Noisy breathing, trouble swallowing, weight loss | Emergency | ## Red Flags That Make It an Emergency Go to an emergency clinic now if you see any of these: - Open mouth breathing while resting - Blue, gray, or white gums or tongue - Breathing with elbows out and neck stretched - More than 40 breaths per minute while asleep or calm - Collapse, weakness, or inability to stand - Panting that does not stop after 5 minutes of rest and cooling - A cat that is gasping, choking, or making a honking sound - Panting with vomiting, diarrhea, or a swollen belly Cats with severe dyspnea often cannot tolerate extra tests right away, which is why emergency vets stabilize breathing first [1]. Do not wait to see if it passes. A cat that cannot breathe well can decline fast. If your cat is panting and also breathing fast at rest, see [Cat Panting or Breathing Fast: What It Means](/knowledge/veterinary-medicine/vet-visit-decisions/cat-panting-breathing-fast). ## What You Can Do at Home While You Wait Stay calm. Your cat reads your stress. Keep the room quiet, cool, and dim. Do not chase or grab the cat unless it is in danger. - Move the cat to a cool area out of the sun. - Offer water in a shallow bowl, but do not force it. - Do not give any human medication. Many are toxic to cats. - Do not wrap the cat tightly or hold it against its will. - Count breaths for 15 seconds and multiply by 4. Write it down. - Note gum color, whether the cat is eating, and any cough or vomit. - Call your vet or an emergency clinic and describe what you see. If your cat is straining to urinate or panting with urinary signs, that is a separate emergency. See [Cat Urinating Frequently: Causes and When to Worry](/knowledge/veterinary-medicine/digestive-and-urinary-care/cat-urinating-frequently-causes-when-to-worry). ## What Your Veterinarian Will Check and Test Your vet will start with the basics. They will watch your cat breathe from across the room, listen to the heart and lungs, check gum color, and feel the pulse. They will ask when the panting started, how long it lasts, and what makes it better or worse. Next comes oxygen if needed. Many dyspneic cats need oxygen before any other test [1]. Then the vet may do point of care ultrasound to look for fluid around the lungs or heart changes [3]. Blood work can check for infection, anemia, and organ function. A heart marker called NT-proBNP can help separate heart causes from other causes, though results are not always clear cut [3]. X-rays or computed tomography may be needed to see the lungs, airway, and chest. In the cat with the laryngopharyngeal web, radiography and CT found the narrowing and the obstructive membrane [5]. If fluid is found, the vet may sample it and send it for testing, as was done in the FIP case where PCR was positive for feline coronavirus [3]. Treatment depends on the cause. Oxygen, diuretics, antibiotics, pain relief, or drainage of fluid may be used. Some cats need surgery. Your vet will set the plan based on your cat's weight, age, and test results. Doses are always calculated for your individual cat. ## Prevention and Monitoring You cannot prevent every cause, but you can lower risk and catch problems early. - Keep your cat indoors and away from traffic and unknown animals. - Provide cool, shaded spaces in summer and never leave a cat in a car. - Watch for fast breathing at rest. A sleeping rate over 30 breaths per minute is worth a call. - Keep up with wellness visits, especially for middle aged and older cats. - Track weight and appetite. Weight loss with fast breathing needs a vet visit. - If your cat has heart disease, follow recheck schedules and give medications as directed. - Limit hard play in hot weather and let your cat rest. If your cat sneezes often along with breathing changes, see [Cat Sneezing: Common Causes and When to Worry](/knowledge/veterinary-medicine/online-vet-and-care-costs/cat-sneezing-causes). ## Limitations and When to Contact a Veterinarian This article cannot tell you what is wrong with your cat. Only a veterinarian who examines your cat can do that. Individual cases need a veterinarian. Call your veterinarian the same day if your cat pants once and then seems fine but you are unsure, if the panting comes back, or if your cat is eating less or hiding more. Go to an emergency clinic now if your cat has open mouth breathing at rest, blue or gray gums, labored breathing, collapse, or panting that does not stop after a few minutes of rest and cooling. Schedule a routine visit if your cat has a long term breathing change, a new cough, or weight loss without an obvious cause. ## Frequently Asked Questions ### How long can a cat pant for? A normal cat should not pant for more than a few minutes after play or heat, and it should stop once the cat rests and cools. If panting lasts longer than that, or happens at rest, treat it as a medical problem and call your vet. ### Is panting normal in cats? Panting is not normal in cats the way it is in dogs. Brief panting after hard play or in high heat can happen, but open mouth breathing at rest is a warning sign of heart, lung, airway, or pain problems. ### Why does my cat pant after play? Cats can pant after intense play because their bodies heat up and they cannot cool down as efficiently as dogs. This is usually harmless if it stops within a few minutes and your cat acts normal afterward. If it happens every time, lasts long, or comes with coughing, have your cat checked. ### What does cat open mouth breathing mean? Open mouth breathing in a cat usually means the cat cannot get enough air or is in pain. It can point to heart disease, lung disease, fluid around the lungs, airway blockage, or severe stress. Any cat breathing with an open mouth at rest needs veterinary care right away. ### Can stress make my cat pant? Yes, stress and fear can make a cat breathe fast with the mouth open. This often happens at the vet, in the car, or around a new animal. It usually settles when the cat feels safe, but if it continues or your cat also hides, shakes, or stops eating, call your vet. ## Related Articles - [Cat Panting or Breathing Fast: What It Means](/knowledge/veterinary-medicine/vet-visit-decisions/cat-panting-breathing-fast) - [Cat Sneezing: Common Causes and When to Worry](/knowledge/veterinary-medicine/online-vet-and-care-costs/cat-sneezing-causes) - [Cat Urinating Frequently: Causes and When to Worry](/knowledge/veterinary-medicine/digestive-and-urinary-care/cat-urinating-frequently-causes-when-to-worry) - [Cat Shaking and Panting: When to Rush to the Vet](/knowledge/veterinary-medicine/vet-visit-decisions/cat-shaking-and-panting) - [Is My Dog's Panting a Sign of Pain or Just Anxiety?](/knowledge/veterinary-medicine/anxiety-and-behavior-support/dog-panting-pain-or-anxiety) - [Why Is My Cat So Itchy?](/knowledge/veterinary-medicine/parasitic-diseases/why-is-my-cat-so-itchy) - [Why Is My Cat Panting Like a Dog? Causes and When to Worry](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-panting-like-a-dog) - [Is It Normal for Cats to Pant? When Panting Is a Warning](/knowledge/veterinary-medicine/symptom-guides/cat-panting-normal-or-warning) - [Labored Breathing in Cats: Causes, Treatment, and When to Worry](/knowledge/veterinary-medicine/emergency-and-first-aid/labored-breathing-in-cats-causes-treatment) ## References 1. [Emergency Dyspnea in 258 Cats: Insights from the French RAPID CAT Study](https://pubmed.ncbi.nlm.nih.gov/40266956/). Veterinary sciences, 2025. 2. [Retrospective Evaluation of Anesthetic-Analgesic Protocols in Cats with and Without Transient Myocardial Thickening Following Gonadectomy](https://pubmed.ncbi.nlm.nih.gov/42450686/). Animals : an open access journal from MDPI, 2026. 3. [Transient Myocardial Thickening in an 11-Year-Old Cat Infected With Feline Infectious Peritonitis and Treated With GS-441524](https://pubmed.ncbi.nlm.nih.gov/42440906/). Case reports in veterinary medicine, 2026. 4. [Keeping an eye on pain: Characterization of pain behaviours in cats undergoing ophthalmic surgery](https://pubmed.ncbi.nlm.nih.gov/42365892/). Veterinary journal (London, England : 1997), 2026. 5. [Atypical Inflammatory Laryngopharyngeal Web With Concurrent Nasopharyngeal Stenosis in an Older Cat](https://pubmed.ncbi.nlm.nih.gov/42746947/). Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association, 2026. ## Further Reading - [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: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information)