What causes a dog to wheeze?

Allergies: Allergies, just like in people, can cause dogs to wheeze. Wheezing can occur when allergens like pollen, mold spores, or dust cause inflammation in the lungs and airways.

Kennel cough: Kennel cough is a highly contagious respiratory infection that can cause dogs to display a range of symptoms, including wheezing.

Heart disease: Wheezing can be a sign of certain heart conditions, particularly those that affect the structure or function of the heart valves or that lead to fluid buildup in the lungs.

Cushing's syndrome: Cushing's syndrome is a condition in which the body produces too much of the hormone cortisol. Among its various symptoms, wheezing can sometimes be heard in affected dogs.

Tracheal collapse: Tracheal collapse occurs when the trachea (windpipe) becomes weak and flattens, making it harder for air to pass through. This condition commonly causes a characteristic “honking” sound when the dog breathes in, but it can also cause wheezing.

Collapsed lung: A collapsed lung, where air leaks from the lungs into the pleural space, can also result in wheezing. This can occur as a result of trauma or underlying respiratory conditions.