When Jan and Dave Griffith's beloved cattle dog, Sophie, fell overboard from the family yacht during rough weather, she feared the worst. But Sophie, a true Aussie battler, wasn't going to give up that easily. She swam six miles through shark-infested waters to a remote Whitsunday island where she survived for five months before being miraculously reunited with her amazed owners. Sophie, a highly domesticated dog, had been living ferally - and surviving. Yet one glimpse of her owners when they were reunited was enough for the old Sophie to re-emerge.