Cows controlled with GPS tracker which plays Waltzing Matilda to stop them escaping; The warning has allowed farmers to track their livestock via an app in a scheme which has seen them graze in wetlands and saltmarsh for the first time in 30 years

Byline: By, Elizabeth Hunter & Rom Preston-Ellis Farmers are controlling cows with a GPS tracker that plays Waltzing Matilda when they get too close to a virtual fence. The musical [...]