Severe equine asthma causes acute respiratory crises requiring emergency management alongside the chronic welfare burden of an incurable but manageable condition.
Horses with severe equine asthma in acute crisis experience extreme breathing difficulty causing evident distress. The effort of breathing through restricted airways exhausts horses physically and mentally. Repeated episodes without adequate management cause permanent airway remodelling. Chronic mild asthma causes persistent subclinical welfare impacts on exercise capacity and comfort. Environmental management eliminating the antigenic triggers is the most effective long-term welfare intervention, substantially reducing the frequency and severity of acute episodes.