Horses that are kept in stalls are at risk of developing respiratory problems due to the large amount of airborne dust concentrations and endotoxins in horse stables. In order to help minimize the amount of dust particles and endotoxins in the barn environment, there are some ways to improve the air quality. For additional information and current updates on the Recurrent airway obstruction (Heaves) in Horses visit HorseDVM's Recurrent Airway Obstruction Page.