Feline Asthma: When Cats Can't Breathe
Feline asthma causes coughing and wheezing in cats. While incurable, it's highly manageable with medication and environmental changes.
Feline asthma is a chronic inflammatory condition of the lower airways, similar to asthma in humans. The airways become hyperreactive to allergens, causing bronchoconstriction, mucus production, and inflammation. Asthma affects 1-5% of cats and is one of the most common causes of chronic coughing in cats.
Key Points
- Feline asthma is an allergic condition causing airway inflammation and constriction
- Siamese and Oriental breeds have higher incidence
- Common triggers include dust mites, pollen, cigarette smoke, and perfumes
- The primary sign is coughing — often mistaken for hairballs
- Inhaled corticosteroids (fluticasone) and bronchodilators (albuterol) are the main treatments
- Obesity worsens asthma; weight management is part of treatment
Understanding Feline Asthma
In asthmatic cats, the immune system overreacts to inhaled allergens. Mast cells and eosinophils infiltrate the airway walls, releasing inflammatory mediators. The airway smooth muscle contracts (bronchoconstriction), mucus glands overproduce, and the airway lining swells. Together, these changes narrow the airways and make breathing difficult. Severe attacks can cause life-threatening bronchospasm. Chronic inflammation leads to irreversible airway remodeling if untreated.
Signs to Watch For
The most common sign is coughing — typically a dry, hacking cough that owners mistake for hairball attempts. Wheezing may be audible, especially during exhalation. Some cats show open-mouth breathing or rapid breathing. In severe attacks, cats extend their necks, breathe with abdominal effort, and may appear panicked. Exercise intolerance and lethargy develop. Cyanosis (blue gums) indicates a life-threatening emergency. Some cats vomit after coughing fits.
Diagnosis
Diagnosis requires ruling out other causes of coughing — heartworm disease, heart failure, lungworm, and respiratory infections. Chest X-rays may show a bronchial pattern (doughnuts and tram lines) and hyperinflation. Complete blood count often shows eosinophilia. Fecal tests exclude lung parasites. Heartworm testing is essential in endemic areas. Bronchoscopy with BAL (bronchoalveolar lavage) confirms eosinophilic inflammation and rules out infection or cancer.
Treatment & Management
Inhaled corticosteroids (fluticasone via AeroKat spacer) are the cornerstone of long-term management. They control inflammation with minimal systemic side effects. Bronchodilators (albuterol) provide rapid relief during acute attacks. Oral prednisolone is used when inhaled therapy isn't feasible or during flare-ups. Cyclosporine helps severe steroid-dependent cases. Environmental control — eliminating dust, smoke, perfumes, and aerosols — reduces triggers. Weight loss in obese cats significantly improves symptoms.
When to See a Vet Immediately
- Your cat has a persistent dry cough
- There's wheezing, rapid breathing, or open-mouth breathing
- Your cat shows signs of panic during breathing
- Gums appear blue during or after coughing
- This is a Siamese or Oriental breed with chronic coughing
How RVC Can Help
This article is for educational purposes only and does not replace professional veterinary advice. If your pet is showing any symptoms, please contact Royal Veterinary Center immediately at +853 6677 6611.