Cat having an asthma attack
An asthma attack in a cat is a breathing emergency. If your cat is crouched with neck extended, open-mouth breathing, or has blue/grey gums, go to an emergency vet immediately.
In the next 60 seconds
- STAY CALM. Your anxiety will worsen your cat's distress and breathing.
- If blue or grey gums are present, this is a life-threatening emergency — call your vet or emergency vet immediately and go without delay.
- Move your cat to fresh air. Remove them from any potential trigger environment — stop using any sprays, candles, or cleaning products immediately.
- Do not restrain your cat or pick them up unnecessarily — handling an oxygen-deprived cat can tip them into collapse.
- If your cat has a prescribed rescue inhaler (e.g. salbutamol via AeroKat spacer), administer it immediately as instructed by your vet.
- To use an AeroKat spacer: shake the inhaler, attach to the spacer mask, place gently but firmly over your cat's muzzle, press the inhaler once, and allow your cat to take 7–10 natural breaths. Repeat if your vet has instructed.
- Keep your cat still and warm — a blanket if available — while you arrange urgent transport.
- Call ahead to the vet so they can prepare oxygen and bronchodilator therapy for your arrival.
Recognise the signs
- Crouching low to the ground with neck extended forward — the classic asthma posture
- Open-mouth breathing — cats almost never breathe through their mouth unless severely distressed
- Audible wheeze or high-pitched breathing sound
- Rapid, laboured breathing with exaggerated chest or abdominal movement
- Blue, grey, or pale gums or tongue (cyanosis) — CRITICAL sign of oxygen deprivation
- Distress, restlessness, or extreme stillness
- Episodes may pass quickly (seconds to a couple of minutes) or persist
- IMPORTANT: Do not confuse with hairball retching — hairball cats typically stand, make repeated gagging motions, then produce a hairball. Asthmatic cats crouch, extend their neck, and do not produce vomit.
First aid steps
- STAY CALM. Your anxiety will worsen your cat's distress and breathing.
- If blue or grey gums are present, this is a life-threatening emergency — call your vet or emergency vet immediately and go without delay.
- Move your cat to fresh air. Remove them from any potential trigger environment — stop using any sprays, candles, or cleaning products immediately.
- Do not restrain your cat or pick them up unnecessarily — handling an oxygen-deprived cat can tip them into collapse.
- If your cat has a prescribed rescue inhaler (e.g. salbutamol via AeroKat spacer), administer it immediately as instructed by your vet.
- To use an AeroKat spacer: shake the inhaler, attach to the spacer mask, place gently but firmly over your cat's muzzle, press the inhaler once, and allow your cat to take 7–10 natural breaths. Repeat if your vet has instructed.
- Keep your cat still and warm — a blanket if available — while you arrange urgent transport.
- Call ahead to the vet so they can prepare oxygen and bronchodilator therapy for your arrival.
Do NOT
- Do NOT restrain or hold your cat down during an attack — this increases oxygen demand and panic.
- Do NOT use aerosols, sprays, or strong scents near a cat having or recovering from an attack.
- Do NOT give your cat human asthma inhalers (e.g. salbutamol without a veterinary prescription and spacer) without prior vet instruction on the correct technique.
- Do NOT delay going to the vet if gums are blue or if the attack does not resolve within 1–2 minutes.
- Do NOT use dusty cat litter in an asthmatic cat's environment — switch to a low-dust pellet or paper-based litter.
- Do NOT give paracetamol for any pain or distress — it is toxic to cats.
While transporting to the vet
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When to phone the vet immediately
- Blue, grey, or white gums — immediate emergency
- Attack lasting more than 1–2 minutes
- Collapse or loss of consciousness
- Severe distress or inability to move
- Rescue inhaler administered but no improvement within 5 minutes
- Increasing frequency of attacks
When it can usually wait
- A known asthmatic cat has a very mild, brief episode (under 30 seconds) that fully resolves, cat returns to normal, and attack frequency is not increasing — still report to vet at next appointment and review trigger management
Common causes
- Allergen or irritant trigger: dust, cigarette smoke, aerosol sprays, perfume, scented candles, dusty cat litter
- Pollen — seasonal variation in attack frequency
- Household cleaning products or air fresheners
- Mould spores
- Stress — can trigger or worsen bronchoconstriction
- Respiratory infection exacerbating underlying asthma
- Cold air or sudden temperature change
What the vet will need to know
- How long did the attack last?
- Was there any colour change in gums or tongue?
- Has your cat been diagnosed with asthma previously? What treatment is prescribed?
- Was a rescue inhaler used? If so, what dose and what response?
- Any known or new potential triggers in the environment?
- How frequent are attacks — is this increasing?
- Any other respiratory symptoms between attacks (e.g. mild wheeze, occasional cough)?
Aftercare
- Feline asthma is a chronic condition requiring long-term management — work with your vet on a plan.
- Long-term corticosteroid therapy (inhaled or injectable) reduces airway inflammation and attack frequency.
- Inhaled bronchodilators (e.g. salbutamol via AeroKat spacer) are used as rescue therapy during attacks.
- Identify and eliminate triggers: switch to unscented, low-dust cat litter; avoid aerosols, perfumes, cigarette smoke, and scented candles in the home; use HEPA air filters.
- Regular vet monitoring — chest X-rays and clinical assessment help gauge disease progression.
- Seek referral to a feline internal medicine or respiratory specialist for poorly controlled asthma.
- Keep an attack diary: note date, duration, severity, and any potential triggers to share with your vet.
Prevention
- Use unscented, low-dust cat litter (paper, wood pellet, or silica gel).
- Do not smoke indoors or near your cat.
- Avoid aerosol sprays, air fresheners, scented candles, and plug-in diffusers.
- Use unscented cleaning products and ventilate well after cleaning.
- Vacuum regularly with a HEPA-filter vacuum to reduce dust and allergens.
- Keep windows open for ventilation when safe to do so.
- Reduce indoor mould — address damp areas and ventilate bathrooms and kitchens.
- Maintain long-term prescribed corticosteroid therapy as directed — do not stop without vet advice.
Breed-specific notes
- Siamese cats have a significantly higher prevalence of feline asthma than other breeds.
- Himalayans, Persians, and other brachycephalic cats may have compromised airways that increase the severity of asthmatic episodes.
- Domestic shorthairs are also commonly affected — feline asthma affects approximately 1–5% of all cats.
Frequently asked questions
How do I tell if my cat is having an asthma attack or trying to bring up a hairball?
This is a very common and important distinction. A hairball cat typically stands upright, makes repeated retching or gagging motions with an extended neck, and eventually produces vomit or a hairball. An asthmatic cat crouches low to the floor with the neck stretched forward, breathes with effort, and may wheeze — without producing anything. If you are ever unsure, treat it as an asthma attack and seek veterinary advice.
What is an AeroKat spacer and does my cat need one?
An AeroKat is a specially designed feline metered-dose inhaler spacer that fits a small mask over your cat's face, allowing them to inhale the medication with normal breaths. It is the gold-standard delivery method for both rescue bronchodilators and inhaled corticosteroids in cats, avoiding the systemic side effects of long-term oral or injected steroids. If your cat has been prescribed an inhaler, your vet will demonstrate the technique.
Can cat asthma be cured?
Feline asthma cannot currently be cured, but it can be very well managed. Many asthmatic cats live normal, comfortable lives with appropriate long-term inhaled corticosteroid therapy, trigger avoidance, and a rescue bronchodilator for acute attacks. Early diagnosis and consistent management give the best outcomes.
Is cat asthma the same as in humans?
It is very similar. Feline asthma involves chronic airway inflammation, bronchoconstriction, and hypersensitivity to triggers — much like human asthma. The same classes of drugs (corticosteroids and bronchodilators) are used, often delivered via inhaler using the AeroKat spacer. The UK climate, with its high levels of dust mites and moulds, can be a factor in triggering episodes.
What should I do between attacks to prevent the next one?
Focus on trigger elimination: switch to low-dust, unscented litter; remove aerosols, candles, and strong scents from your home; consider a HEPA air purifier in rooms where your cat spends most time; do not allow anyone to smoke indoors. Maintain any long-term prescribed medication without gaps. Keep a diary of attacks to identify patterns and share with your vet.