Cat having difficulty breathing

Recognise the signs

• Open-mouth breathing — in cats this is ALWAYS abnormal; cats are obligate nasal breathers and do not pant like dogs
• Blue, grey, or white gums or tongue (cyanosis) — indicates critically low oxygen; imminent collapse
• Neck extended forward, elbows pushed out from body — trying to open airway
• Rapid, shallow, or laboured breathing with visible effort from belly or flanks
• Noisy breathing — wheezing, crackling, gurgling, or high-pitched stridor
• Sitting hunched with reluctance to lie down
• Abdominal breathing — the belly pumping hard with each breath
• Lethargy, weakness, or sudden collapse
• Pale or mottled skin visible inside the ears
• Reluctance to move; panicking when disturbed

First aid steps

1. 1. Phone your vet or the nearest emergency veterinary hospital immediately — do this first, before anything else.
2. 2. Keep the cat as calm and still as possible. Speak softly; avoid sudden movements or loud noise.
3. 3. Do not pick the cat up unnecessarily. If you must move her, support her body and keep her upright — never lay her on her side or back.
4. 4. Place the cat in a well-ventilated carrier with the door open or with ventilation holes facing the air. Keep her front feet on the floor of the carrier so she can brace herself to breathe.
5. 5. If it is a hot day, keep the environment cool and well-ventilated — never put the carrier in a hot car boot.
6. 6. Do not attempt to give anything by mouth — no food, water, or medication.
7. 7. Drive to the vet as smoothly and quickly as safely possible. If possible, have a second person ride in the back monitoring the cat while you drive.
8. 8. If the cat loses consciousness, gently check the airway is clear by opening the mouth briefly and removing any obvious obstruction — then proceed immediately to the vet. Only attempt CPR if the cat has no heartbeat and is not breathing, and you have been trained to do so.

While transporting to the vet

• Keep the carrier level and upright at all times — do not tilt or jolt it.
• Ensure good airflow into the carrier; crack a window in the car if safe to do so.
• Talk quietly and reassuringly to the cat.
• Monitor the colour of the gums if you can safely observe them — blue/grey gums mean call the vet again en route to warn them.
• Do not try to medicate or administer anything during transport.
• Phone ahead so the vet team is ready on arrival — cats in respiratory distress should be triaged immediately.

When it can usually wait

• There are no signs of breathing difficulty that can safely wait. Any cat showing respiratory distress must be seen by a vet as an emergency.

Common causes

• Feline asthma or bronchitis — airways narrow due to inflammation and spasm
• Pleural effusion — fluid accumulating around the lungs (associated with heart disease, pyothorax, chylothorax, feline infectious peritonitis/FIP)
• Pneumothorax — air in the chest cavity, often from trauma or spontaneous rupture
• Diaphragmatic hernia — abdominal organs pushed into chest, usually after a road traffic accident
• Upper airway obstruction — foreign body, laryngeal paralysis, nasopharyngeal polyp
• Pyothorax — pus in the chest cavity, a serious bacterial infection
• Congestive heart failure — fluid on the lungs (pulmonary oedema)
• Anaemia — severe anaemia reduces oxygen-carrying capacity
• Tumour or mass pressing on airway or lung tissue

What the vet will need to know

• When did the breathing difficulty start and did it come on suddenly or gradually?
• Has the cat been in any accident or trauma recently (e.g., possible road traffic accident)?
• Any known history of asthma, heart disease, or previous breathing problems?
• Any recent weight loss, reduced appetite, or lethargy?
• Is the cat indoor-only or does she go outside?
• Any known exposure to chemicals, smoke, or toxins?
• Any current medications?
• Colour of the gums when you last checked

Aftercare

• Follow the vet's discharge instructions precisely — medication compliance is critical.
• If asthma is diagnosed, the vet may prescribe a feline metered-dose inhaler with a spacer (AeroKat) and corticosteroids.
• If pleural effusion is drained, monitor closely for recurrence — resting respiratory rate monitoring at home may be recommended.
• Create a calm, low-stress environment for recovery.
• Restrict activity as advised by your vet.
• Attend all follow-up appointments — repeat chest X-rays or ultrasound may be needed.
• Learn to count your cat's resting respiratory rate at home: normal is 20–30 breaths per minute in a sleeping or resting cat.
• Keep emergency vet contact details visible and accessible at all times.

Prevention

• Keep the cat indoors to reduce trauma risk (road traffic accidents, falls from height).
• Attend annual veterinary check-ups — many underlying causes (heart disease, FIP, tumours) are detected early.
• Minimise exposure to aerosol sprays, cigarette smoke, dusty litter, and strong cleaning products which can trigger asthma.
• Use low-dust, unscented litter for cats with respiratory sensitivities.
• Maintain a healthy body weight — obesity worsens respiratory function.
• Keep vaccinations up to date, including against FIP (Nobivac FIP where available) for high-risk cats.

Breed-specific notes

• Brachycephalic breeds (Persian, British Shorthair, Exotic Shorthair) — narrowed nostrils and elongated soft palate make breathing harder even at baseline; they deteriorate faster in respiratory emergencies.
• Maine Coon and Ragdoll — higher incidence of hypertrophic cardiomyopathy (HCM) which can cause pleural effusion; annual cardiac screening recommended.
• Birman and British Shorthair — also at increased HCM risk.

Frequently asked questions

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