Severe equine asthma
Severe equine asthma is a relatively new term used for the condition also formerly known as recurrent airway obstruction (RAO), chronic obstructive pulmonary disease (COPD), heaves or broken wind. It's a common chronic respiratory disorder seen in horses and ponies. In less severe cases the problem may go undetected, but may worsen over time if not treated. If exacerbated by high exposure to moulds, dust or pollens, it may present acutely as respiratory distress.