Tracheal Mucus is Associated with Poor Racing Performance in Thoroughbred Horses

Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA. Horses with no or scant amounts of tracheal mucus were nearly twice as likely to finish well in a race compared with horses with moderate to severe amounts of mucus in their tracheas. Therefore, moderate to severe amounts of tracheal mucus may cause poor racing performance in Thoroughbred horses.