What Causes Wheezing In Horses?

What Causes Wheezing In Horses? Equine RAO or severe equine asthma includes diseases characterized by bronchoconstriction (airway narrowing), excessive mucus secretion and obstruction to airflow resulting in reversible breathlessness, wheezing and coughing. Two forms of recurrent airway obstructive diseases of horses have been recognized for decades. What are the symptoms of heaves in horses? Horses