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Chronic coughing in family pets can have lots of causes. Certainly viral and bacterial infections may play a role in some pets. Bordatella and Parainfluenza are two common microbes that may cause coughing in affected dogs and cats. Migrating parasites, including heartworm and lungworms, may also cause coughing in some pets, and these may normally be detected on microscopic stool check.
Inhaled foreign bodies can on rare occasion be causes of chronic coughing in pets. In some pets, inflammatory and/or allergic reactions may also be involved, leading to an asthmatic type of condition, especially in cats. Anatomic problems, including tracheal collapse in toy breed dogs also may be contributing to chronic cough. Cardiac diseases, including leaky mitral valves and other heart disorders also may be involved in chronic coughs, especially in older dogs.
In older pets, cancer of the lungs or other organs also may be contributing to chronic cough. because of these lots of possibilities, it is crucial for any pet with a history of chronic cough to have a full medical workup, including CBC/chemistry blood work/ heartworm test/ stool check, as well as x-rays and possible tracheal washes for microscopic exam of airway discharge. EKG and/or cardiac ultrasound also may be needed.