Cat breathing difficulty (dyspnoea)

Why feline dyspnoea is so serious

Cats compensate for respiratory and cardiac problems for months without signs. When you see visible effort — chest working hard, abdomen heaving, mouth open — disease is already significant. Unlike dogs, cats rarely pant normally; panting in a cat is almost always abnormal.

What to watch (and tell the vet)

• Resting respiratory rate: count breaths while the cat sleeps or relaxes. Normal: 20-30/min. Over 40 at rest = abnormal, over 60 = emergency.
• Respiratory effort: pronounced abdominal movement, chest „pumping", raised shoulders.
• Open-mouth breathing: EXTREME emergency. Cats only mouth-breathe when their lungs can't cope.
• Gum colour: pale pink, white, blue (cyanosis) = low oxygen. Yellow gums = possible liver involvement.
• Characteristic position: elbows out, neck extended, refuses to lie down — trying to breathe easier.
• Cough: rarer in cats than dogs. When it appears, it often suggests asthma.

Common causes

• Feline asthma: chronic cough, wheezing. Acute attacks triggered by dust, perfumes, smoke, mould. Needs ongoing treatment with inhaled or oral steroids.
• Heart disease: hypertrophic cardiomyopathy (HCM) is the most common feline heart disease. Can appear suddenly with pulmonary oedema or pleural effusion — cat is breathing hard and panicked.
• Pleural effusion: fluid around the lungs — cardiac, infection (FIP, pyothorax), cancer (mediastinal lymphoma), chylothorax. Needs emergency drainage.
• Pneumonia: bacterial, viral, aspiration.
• Acute asthma / allergic bronchitis.
• Upper airway obstruction: nasopharyngeal polyp, foreign body, tumour.
• Severe anaemia: rapid breathing, white gums.
• Complicated FLUTD: urinary blockage with dehydration and acidosis, compensatory rapid breathing.

What to do NOW if your cat is struggling to breathe

Don't panic visibly — stressed cats breathe even harder. Place in a carrier lined with a towel, without forcing. Don't hold against your chest — pressure on the ribs makes it worse. Phone the clinic so they can take you straight in. Drive with the window slightly open for fresh air, no jolts or sudden braking. DO NOT try home medications. Any wrong move (a human antihistamine, a decongestant) can be fatal.

EXTREME EMERGENCY SIGNS — go immediately

• Open-mouth breathing
• Blue, grey or white gums
• Respiratory rate above 60/min at rest
• Collapse, unresponsiveness
• „Orthopneic" position (elbows out, neck extended, refuses to lie down)
• Visible abdominal effort or cat „pumping"

At the vet

Oxygen therapy first — cat is placed in an oxygen cage or given supplemental oxygen by mask. Investigations (X-ray, echocardiography, possibly diagnostic and therapeutic thoracocentesis for effusion) happen ONLY after stabilisation. The vet will work step by step — don't push for fast answers during a crisis.