At loose ends with her daughter leaving home and her husband on the road, Sue Halpern decided to give herself and Pransky, her under-occupied Labradoodle, a new leash-err, lease-on life by getting the two of them certified as a therapy dog team. Smart, spirited, and instinctively compassionate, Pransky turned out to be not only a terrific therapist but an unerring moral compass. In the unlikely sounding arena of a public nursing home, she led her...