Some years ago, there was a television commercial for cheese, an ad in which people were shown doing all sorts of risky and humorous things in order to acquire a piece of golden cheddar. At the end of the commercial, a mellow male voice would intone, “Behold the power of cheese.” We saw this power in action a few times with our dog Bonnie. One wintry day several years ago, Bonnie was outside exploring. My wife heard her run up onto the back deck, and so she went to let the dog in. When she opened the door, she saw Bonnie holding the rear half of a large rabbit in…