Veterinarians at the University of Missouri are warning horse owners to keep a close watch on their animals. There’s been a regional outbreak of a potentially deadly virus, called Equine Herpes Virus 1. Almost 20 cases have been reported in horses that attended the National Cutting Horse Association Western National Championships in Utah. Three horses have died. There are no confirmed cases in Missouri, but the virus is highly contagious. Look for nostril discharge, weakness standing and high fever.