There was a story about a woman sending a chessie to Rex Carr. After about six months she flew to California to see how the dog was doing and also learn to handle it. She walks to the line with the dog to run a blind and Rex hands her a galvanized trash can lid. She asked what it was for and he said it was to protect herself if she had to blow the whistle three times. She didn't believe it and ended up with over 70 stitches across her chest.