Kadie Anderson, a veterinary intern at Pt. Defiance Zoo and Aquarium in Tacoma, Wash., gets up close with Sumatran tiger Malosi's teeth during a cleaning as part of a physical examination earlier this month. The tiger, under general anesthesia during the procedure, had a breathing tube inserted down his throat to help protect his airway. (AP Photo/The News Tribune, Dean J. Koepfler)