By Sarah Ping, PA & Rom Preston-Ellis Blackpool Zoo has been feeding its female elephants food laced with different colours of edible glitter to help determine whether or not they are pregnant. Tara, Noorjahan and Esha, all female Asian elephants, have eaten food containing a different colour of edible glitter to help zookeepers identify each of their faeces. This clever idea is part of the European Endangered Species Programme’s advice. It helps keep an eye on the elephants’ baby-making cycles, which happen every 13 to 16 weeks. Twice a week, the glittery poo samples are sent off to a lab at …