Deer whistles - some swear by them and some say they don't work at all. Is there any real evidence that they work? We had one of our group lay down his bike yesterday because of an encounter with a deer. Both he and his wife were taken to hospital and then released. She has some ankle problems but her leathers saved her from some serious cuts. Her husband had taken off his jacket so he has some serious road rash but all is fine. We are all worried that she will not get back on the bike. Any advice to give her?