Chicken has gone off the menu at many Siliguri homes with the Darjeeling district administration confirming bird flu in a village located just over 20km from the town. Culling operation in Poinikumari, the affected village, and areas within a 5km-radius started yesterday. "The team from the animal resource development department had culled 3,973 poultry birds yesterday. Another 7,000 are expected to be culled by 11pm today,' said Rajesh Pandey, the district magistrate of Darjeeling.