Canine ConfidentialFor all the love and attention we give dogs, much of what they do remains mysterious. Just think about different behaviors you see at a dog park: We have a good understanding of what it means when dogs wag their tailsbut what about when they sniff and roll on a stinky spot? Why do they play tug of war with one dog, while showing their bellies to another? Why are some dogs shy, while others are bold? What goes on in dogs heads and heartsand how much