Quick answer
A healthy cat at rest or asleep takes about 15 to 30 breaths per minute. A cat breathing fast after play or in a hot room should settle within a few minutes. A resting rate that stays above 30 breaths per minute needs a call to your vet today, and open-mouth breathing, a working belly or blue or gray gums is an emergency that needs a vet now.
A cat breathing fast at rest is one of the signs vets take most seriously. Cats hide illness well, so by the time breathing changes, the problem is often advanced. If you see any sign in the red box, go to the nearest emergency vet now.
What is a normal breathing rate for a cat?
A normal resting or sleeping breathing rate for a cat is about 15 to 30 breaths per minute. The rate while asleep is usually a little lower than while resting awake. Breathing should be quiet, smooth and mostly done with the chest, with little visible effort from the belly.
A resting or sleeping rate that’s consistently above 30 breaths per minute is considered increased. It’s worth calling your vet the same day, even if your cat seems otherwise fine.
| Situation | Breaths per minute | What to do |
|---|---|---|
| Asleep or resting calmly | 15 – 30 | Normal |
| Just after play, stress or a car ride | Higher, settles within minutes | Let them rest and recount |
| Resting, consistently above 30 | 31 – 40 | Call your vet today |
| Resting, above 40, or any open-mouth breathing | 40+ | Go to a vet now |
How do I count my cat’s breathing rate?
Count when your cat is asleep or resting calmly, not purring, and not just after play.
- Watch the chest or flank rise and fall. One rise and one fall is one breath.
- Count the breaths for 30 seconds using a phone timer.
- Multiply by 2 to get breaths per minute.
- Write it down with the date and time.
Counting a few times over several days shows you your cat’s normal. If your cat has heart disease, your vet may ask you to track the sleeping breathing rate every day, because a rise can be the first sign of heart failure before other signs appear.
Why is my cat breathing fast?
Fast breathing can come from the lungs, the heart, the space around the lungs, or from problems elsewhere, like pain or fever. According to Cornell Feline Health Center, the three most common causes of breathing difficulty in cats are asthma, heart failure and fluid around the lungs (pleural effusion).
| Cause | Common signs | Urgency |
|---|---|---|
| Exercise, heat or stress | Settles within minutes once cool and calm | Monitor |
| Upper respiratory infection | Sneezing, nasal discharge, blocked nose | See vet soon |
| Fever or pain | Quiet, hiding, not eating, sore to touch | See vet soon |
| Asthma | Coughing that looks like hacking up a hairball, wheezing, flare-ups | Emergency |
| Heart disease or heart failure | Fast breathing at rest, tiring easily, may not have a murmur | Emergency |
| Pleural effusion (fluid around the lungs) | Fast, shallow breathing, belly working hard | Emergency |
| Blood clot to the back legs | Sudden back-leg weakness or paralysis, crying out, cold paws | Emergency |
| Chest injury, anemia, heartworm or a tumor | Varies, often weakness and pale gums | Emergency |
A blocked nose from a cold can make some cats breathe through their mouth. If your cat is also sneezing a lot with discharge but is eating and otherwise bright, call your vet for advice. Mild congestion is less urgent than true breathing distress, but don’t guess if you’re unsure. Our guide to cat upper respiratory infection explains the common viruses.
Hyperthyroidism in older cats can also speed up breathing and the heart rate, and can lead to heart disease if untreated. See our guide to hyperthyroidism in cats.
Is open-mouth breathing in cats an emergency?
Yes, in most cases. Dogs pant to cool down, but cats rarely do. Open-mouth breathing in a cat at rest usually means they can’t get enough air through the nose alone. That can be from heart failure, fluid in the chest, an asthma attack or a blockage.
The one exception is brief panting after intense play, a stressful car ride or overheating, which stops within a few minutes once your cat is calm and cool. If it doesn’t stop, or you’re not sure, treat it as an emergency.
What should I do if my cat is in respiratory distress?
Respiratory distress means your cat is struggling to breathe. Signs include fast breathing, open-mouth breathing, a belly that works hard with each breath, a stretched-out neck, and elbows held away from the body. Cornell notes that any cat showing breathing difficulty is at high risk of dying without prompt treatment.
- Go now. Call the nearest emergency clinic on the way so they’re ready for you.
- Handle as little as possible. Stress uses up oxygen. Gently place your cat in a carrier, and don’t hold them on their back.
- Keep them cool. Keep the car cool and well ventilated, and cover the carrier partly with a towel to reduce stress.
- Don’t give anything by mouth. No food, water or medicines. Never give human medicines, many of which are toxic to cats.
At the clinic, the team will usually give oxygen first and keep handling to a minimum until your cat is stable. Then they may use chest x-rays, an ultrasound of the heart and chest, and bloodwork to find the cause. If there’s fluid around the lungs, draining it can bring fast relief.
| Service | Typical cost |
|---|---|
| Emergency exam | $100 – $250 |
| Oxygen therapy (per day) | $300 – $1,000 |
| Chest x-rays | $200 – $450 |
| Heart ultrasound (echocardiogram) | $400 – $900 |
| Draining fluid from the chest | $300 – $800 |
For a full breakdown, see emergency vet cost for cats. If you’re not sure how urgent your cat’s signs are, our symptom check can help, and you can browse more cat symptoms guides.
Frequently asked questions
Is it normal for a cat to breathe fast while sleeping?
No. A sleeping cat should breathe slowly and evenly, usually under 30 breaths per minute. Brief twitches during dreams are normal, but a sleeping rate that stays above 30 needs a call to your vet.
Why is my cat breathing fast and panting?
Cats rarely pant. Short panting after hard play or in heat that stops within a few minutes can be normal. Panting at rest, or panting that doesn't settle, can mean heart or lung disease and needs a vet right away.
Can stress make a cat breathe fast?
Yes. Car rides, vet visits and fear can briefly raise a cat's breathing rate. It should return to normal soon after your cat calms down. If it doesn't, call your vet.
Can I give my cat anything at home for breathing problems?
No. There's no safe home treatment for a cat that's struggling to breathe. Keep your cat calm, avoid handling them much and get them to a vet. Never give human medicines.
Sources
Written by the CatsMed Team from the sources above. This guide isn’t reviewed by a veterinarian and isn’t a substitute for one. See how we research.
