I am finding all of this very fascinating as I have assisted in training German Shepard Dogs for almost 15 years now in conjunction with SteiningTal Kennel in Campbellsport, WI. I have heard of blood trailing dogs, but really never gave much thought to the subject. I am going to do some research to perhaps start my own trailing dog, which can only benefit me (from having to be called out to help track my boyfriends deer)along with benfitting my friends, family and others nearby. Thank you for starting this thread to bring attention and awareness to this. Aside from the book you mentioned Rob, any other resources which I should seek out?