I haven't purchased a book or tape yet as I was primarily concentrating on obedience skills. I just did this pheasant wing thing on a recomendation from a friend. and something to do on our walks in the woods. The piece of woods I take him is full of deer but void of upland birds. The deer scent seems to peak his interest and that was starting to concern me a little so I thought this method would be a good distraction. Can you recommend a tape or book?