Respiratory Support Herbal Formula for Horses helps maintain a normal healthy respiratory system. May be beneficial in supporting normal recovery after strenuous activity, helping maintain normal lung integrity and function, and assisting the body in combating environmental pollutants. Respiratory Support Herbal Formula contains a proprietary blend of herbs, including mullein, Echinacea, Irish moss, pleurisy, yarrow, barberry, garlic, boneset, licorice, and goldenseal. Feed 1 scoop daily for a 1000 - 1200 lb. horse. Herbal blend.