U.S. Army Sgt. Margot Coakley, NCO in charge of the veterinary treatment center at Ellsworth Air Force Base, S.D., cleans military working dog Erik’s teeth April 20, 2017, at Malmstrom Air Force Base, Mont. The MWDs receive routine physicals and dental care to maintain their health so they can perform their jobs. (U.S. Air Force photo/Staff Sgt. Delia Marchick)