NEW YORK - When he was a boy, Hiram Stewart took a bus to Virginia, put a puppy in a paper bag and cradled it all the way home to New Orleans.For more than three decades, he’s cared for dogs in the Big Easy. Usually champion dogs, the kind that will reach the Best in Show ring this week at Westminster.Still, nothing prepared him for what he saw happening to pets around town after Hurricane Katrina hit. Like that pair of little beagles with the pleading eyes, chained inside a garage.“Every time a car would drive by, they’d come out,...