Asthma is a conditions which can occur in both humans and their cat companions, and the asthmatic condition that cats experience is extremely similar to asthmatic conditions in people. This type of condition affects the respiratory system, and on a chronic basis the tissues of the airways become irritated and inflamed as a result of an allergic reaction. In many cases excess mucous is produced, and in severe cases the airways may become constricted. While cats can become afflicted with asthma, there are subtle differences between asthma in dogs and asthma in cats.