It is not wise to feed animal fat. Robinson said poor-quality hay and dusty housing conditions are precursors to many airway problems in horses. In an effort to reduce airway problems, it would benefit the horse if hay were soaked in water before being fed to reduce the amount of dust present. The use of pelleted feed or haylage also can reduce dust in feedstuffs. According to Robinson, poor-quality straw has the most dust of any bedding.
Wood chips are a better bedding option, but clay is the best.
Good barn ventilation is necessary to remove as much dust as possible from the air. Do not keep barns closed up, even in the winter. It is important to have several air exchanges per day in a barn. In horses already affected by airway disease, the use of corticosteroids to reduce inflammation in the airways often is required. The drug will work faster and more effectively if administered via inhalation.