Feline Bronchial Disease is also known as feline asthma, allergic airway disease, chronic bronchitis, allergic bronchitis or feline chronic small airway disease. These terms all describe a condition where the airways in the lung tissue become inflamed. This may cause the airways to constrict, reducing airflow which causes a classic "asthma" attack in some cats. In other cats the airways become thickened and secrete large amounts of mucus which also restricts the movement of air in and out of the lungs.