When cameras roll and directors call, "Action," some of the most dependable, funniest, and most enthusiastic actors stand poised on four legs, with ears alert. From Joey in War Horse to the wolves in Game of Thrones, what we see on screen is the result of meticulous preparation and professional teamwork. These eye-popping, heartwarming stories reveal the trainers, actors, directors, and animals in behind-the-scenes glory. You'll discover...