SYDNEY (Reuters) -Helicopters were being used on Sunday to drop animal feed to farmers in Australia's New South Wales state stranded by floods that have killed five and isolated tens of thousands in the country's southeast. Recovery is under way in the mid-north coast region of Australia's most populous state after days of flooding cut off towns, swept away livestock and destroyed homes. About 32,000 residents remained isolated due to floodwaters, which were slowly starting to recede, the state's Emergency Services posted on the X platform.