THE INJURED DOG PROTECTED THE LITTLE GIRL. THEN I READ THE VEST AGAIN. The ER doors blew open so hard they hit the wall. A huge German Shepherd, bleeding from a dozen cuts, limped in. It was half-dragging, half-guarding a little girl. She was maybe six. Her lips were blue. She was cold to the touch. The dog wouldn't let any of us near her at first. It just stood over her, trembling, letting out these soft whimpers. It was the most heartbreaking thing I’d ever seen. The girl had bruises on her ar