';How is it they can get a killer whale to urinate on cue, and we can't get our son to pee into the toilet?' Amy Sheldrake, young mother and killer whale trainer-in-training, marvels at the complex behaviors her superiors at SeaWorld are able to coax out of these enormous beasts, while she and her husband struggle to make their belovedand much smallerson Josh obey the simplest rules. Using the sto...