Feline Asthma

Feline asthma is often misdiagnosed or missed entirely because the most visible sign — a hunched cat with the neck stretched out making a hacking sound — looks remarkably like a cat trying to bring up a hairball. The two have completely different physiological causes and asthma is significantly more serious. Where hairball retching usually produces an actual hairball (or at least the attempt), asthmatic coughing is dry and unproductive, and tends to recur in episodes rather than as isolated events.

The underlying mechanism is identical to human asthma: an allergic inflammatory response in the lower airways. When an asthmatic cat inhales a trigger, immune cells lining the bronchi release histamine and other inflammatory chemicals. The airway walls swell, mucus production increases, and the smooth muscle around the bronchi constricts. Air can get in but struggles to get out — producing the characteristic wheeze and the laboured breathing that follows.

Diagnosis combines clinical signs with imaging (chest X-rays often show the typical "doughnut" appearance of thickened bronchial walls) and sometimes bronchoalveolar lavage to confirm airway eosinophilia. Once diagnosed, the gold-standard treatment is daily inhaled corticosteroid via a feline-specific spacer such as the AeroKat. This delivers steroid directly to the airways, achieving the therapeutic effect without the side effects of oral or injected steroids. Most cats adapt to the inhaler within a couple of weeks of patient training. A rescue bronchodilator (typically albuterol) is kept on hand for acute attacks.

Environmental modification matters as much as medication. Identifying and removing the triggering allergens — often through trial and error — can reduce attack frequency dramatically and lower the steroid dose needed. Asthmatic cats live full lives with good management; the disease becomes dangerous primarily when it goes unrecognised or undertreated.