History shows that hanging around the Kennedy clan can be hazardous to one's health and the latest victim is a poor, innocent hunting dog named Lefty, accidentally shot to death by Maria Shriver's brother, Mark! The champion English springer spaniel was shot and killed during a hunting trip near Gettysburg, Pa., the Washington Post reports. Officials at the private hunting preserve called Shriver a ``very sloppy hunter'' who did ``unsafe things'' and banned him from ever hunting there again. But Shriver, who paid the dog's heartbroken owner $9,500 in compensation, told the Post the dog's death was a ``tragic...