You may have heard of the book "The Secret Life of Boys," well Rex and Sparky (aka The Onion Writers) came out with "The Secret Life of Dogs." My mom stayed up reading it because she couldn't stop laughing. It tells all the great stuff to roll in, the best shoes to eat (Vera Wang adorned with crystals) and just great dog info. As a sample, it give the pluses and minuses of various bones/chew items. Cow hooves: plus - they taste good, minus - they can give us "poochie scoots."