Furthest distance tracked by a lost dog

The farthest distance that a lost pet dog has found his way home occurred in 1979 when Jimpa, a labrador/boxer cross, turned up at his old home in Pimpinio, Victoria, Australia after walking 3,218 km (2,000 miles) across Australia. His owner, Warren Dumesney (Australia), had taken the dog with him 14 months earlier when he went to work on a farm at Nyabing, Western Australia. During his trek the dog negotiated the almost waterless Nullarbor Plain.