Deer whistles you mean? Ours have saved us MANY times. It's almost come down to the fact that a deer will just stop and look at us instead of running into the street. My family has sworn by them for years and we've never hit a deer. Chance? Maybe. Lu...
Yes, there are books and videos listed at the bottom of Check Amazon too, as there are more books out there on the subject.
A very difficult question to answer well. There are many types of deer of which I personally have only seen about 8 and of them only watched two extensively. Deer walk and run. If you have watched a horse walking or running them you see much what you...