U.S. Air Force Staff Sgt. Timothy Castillo, 7th Security Forces Squadron military working dog trainer, checks his dog, Axa, for any bites, swellings and abnormal growths that could prevent him from performing everyday duties Aug. 10, 2015, at Dyess Air Force Base, Texas. Military working dog handlers are trained with emergency field veterinary skills to keep the dog healthy while deployed; however, the base veterinary staff cares for the dogs on a day-to-day basis while at home. (U.S. Air Force photo by Airman 1st Class Austin Mayfield/Released)