Why Is My Cat Coughing? Causes, and When to Call

Contents

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Start with the confusion that matters, because getting it wrong is the one that costs an animal.

A coughing cat crouches and stretches its neck out. A cat in respiratory distress does something that looks remarkably similar: Merck's clinical description is a crouched position on all four limbs with the chest slightly raised.

So posture alone will not tell you which one you are looking at. Every page that shows you a picture of a hunched cat and tells you that is what coughing looks like has left out the half that matters.

Here is what does separate them.

Cough, hairball, or trouble breathing?

	A cough	A hairball	Trouble breathing
Where the effort comes from	The chest	The belly, heaving up	The whole ribcage, continuously
The mouth between events	Closed	Open at the end, producing something	Often open, and staying open
What comes out	Nothing, or a little saliva or bile	Hair, or food	Nothing
Gums and tongue	Normal pink	Normal pink	Pale, blue or muddy
Between episodes	The cat looks normal	The cat looks normal	The cat is still working to breathe

An open mouth in a cat that is not eating, grooming or panting after play is an emergency. Cats do not breathe through their mouths casually the way dogs do. Blue or grey gums are an emergency. Both mean now, not in the morning.

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The number you can count at home

This is the single most useful instrument on the page, and it costs nothing.

Wait until your cat is resting or asleep, not purring. Watch the chest and count one breath each time it rises and falls. Count for 30 seconds and double it.

A healthy resting cat sits under 30 breaths a minute. Consistently over 30 at rest warrants a vet visit.

Write the number down when your cat is well. A baseline you measured yourself is worth more than any range on a page, because you will know the moment it changes.

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What actually causes a cat to cough

Feline asthma and chronic bronchitis are the big one, and the sources genuinely disagree on how common and at what age, which we would rather show than average away. It is a lifelong condition that is managed rather than cured, and the trigger picture is thinner than most pages imply.

Parasites. Lungworm, Aelurostrongylus abstrusus, is real and geographically variable: a UK study of 950 cats found 1.7%. Heartworm-associated respiratory disease matters in areas where heartworm is endemic, and that is a genuinely regional question.

Infections. The feline respiratory complex, plus Mycoplasma and Bordetella.

Foreign material, inhaled and stuck.

Tumors. In a cohort of 57 cats with lung tumors, coughing was a presenting sign in 37%.

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The thing that is true in dogs and not in cats

Dogs with heart disease cough. It is one of the classic signs.

Cats with heart disease usually do not. This is confirmed independently by the 2021 feline life stage guidelines, by veterinary cardiology at Tufts, and by VCA. A cat with heart trouble is far more likely to present with fast or laboured breathing than with a cough.

It matters because the transfer runs the wrong way round: an owner who knows the dog rule may watch for a cough and miss the breathing.

Call now, not tomorrow

Open-mouth breathing in a cat that is not playing or panting from heat
Gums or tongue that look pale, white, blue or muddy
Neck stretched out with elbows held away from the body
A resting breathing rate consistently over 30
Collapse, or sudden weakness
Coughing up blood
Coughing that comes in a bout the cat cannot stop

Anything that worries you about your cat is a reason to call your vet, and out of hours, an emergency clinic. Nothing on this page is ever a reason to wait.

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What the vet will actually do

So you know what you are agreeing to rather than being surprised by it: chest radiographs, usually first. Possibly an airway wash, where a small amount of fluid is put into the airway and drawn back to see what is in there. A faecal test if lungworm is on the list. Sometimes blood work, sometimes an ultrasound of the heart if the picture points that way.

That is a description of a workup, not an instruction. What is on the list for your cat is your vet's call.

What to take away

Posture does not distinguish a cough from respiratory distress. The mouth, the gum color and what happens between episodes do.
Learn your cat's resting breathing rate now. Under 30 is normal; consistently over is a visit.
Asthma is the commonest cause, and it is managed rather than cured.
Cats with heart disease usually do not cough, unlike dogs. Watch the breathing instead.
Open mouth or off-color gums means go now.

The breeds most affected

In our breed profiles, this predisposition is documented and sourced for:

SiameseNone.BalineseMODERATE

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The vet's take

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Frequently asked questions

Is my cat coughing or trying to bring up a hairball?

Look at where the effort comes from. A cough is a chest event and produces nothing, or a little saliva. A hairball is an abdominal heave that comes up from the belly and ends with something on the floor. The postures look alike, which is why the effort and the outcome are the better test.

How do I know if my cat is struggling to breathe?

An open mouth in a cat that is not eating, grooming or panting after exercise, gums or tongue that look pale, blue or muddy, elbows held out from the body, and effort that continues between coughs. Any of those is an emergency, and the right move is an emergency clinic, not a page.

What is a normal breathing rate for a cat?

Under 30 breaths a minute at rest or asleep. Count the chest rising for 30 seconds and double it. Consistently above 30 at rest warrants a vet visit. Measuring it while your cat is well gives you a baseline worth far more than any published range.

Do cats cough when they have heart disease?

Usually not, which is the opposite of dogs. This is confirmed by the 2021 feline life stage guidelines and by veterinary cardiology sources. A cat with heart disease is much more likely to show fast or laboured breathing than a cough, so watching for a cough is watching the wrong thing.

What is the most common cause of coughing in cats?

Feline asthma and chronic bronchitis. It is a lifelong condition that is managed rather than cured, and how common it is and at what age it starts genuinely varies between published sources.

Can worms make a cat cough?

Yes. Lungworm can, and it is geographically variable: a UK study of 950 cats found 1.7% affected. Heartworm-associated respiratory disease matters where heartworm is endemic. Both are diagnosed by a vet rather than guessed at.

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This is information, not veterinary advice, and it cannot tell you what is wrong with your cat. Our rule is a simple one: if something is wrong with your cat, call your vet, and call an emergency clinic if it is out of hours. Nothing you read here is a reason to wait.

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