A pioneering canine behaviorist draws on cutting-edge research to show that a single, simple trait—the capacity to love—is what makes dogs such perfect companions for humans, and explains how we can better reciprocate their affection.   “Lively and fascinating . . . The reader comes away cheered, better informed, and with a new and deeper appreciation for our amazing canine companions and their enormous capacity for love.” —Cat Warren, New York Times best-selling author ofWha