When 15-month old Ethan of Lincoln Park, Detroit, suffered a medical emergency in his crib, Dude instinctively knew the toddler was in trouble. Ethan was staying with his grandmother, Tina Bury, when she noticed her dog Dude behaving oddly. Not typical of Dude, the sheltie-terrier mix whined, barked and seemed to be trying to tell Tina something. At first Tina thought he wanted to be let outside, but when she opened the outside door, he...