The Denver Zoo is fighting to keep their doors open and 3,000 animals fed amid the COVID-19 pandemic Like many other businesses, the Denver Zoo had to restructure and cut different programs to keep its doors open and to keep the animals healthy when the novel coronavirus arrived to Colorado. They're already short about $10 million in revenue this year compared to last. and last updated 2020-12-29 15:35:40-05 DENVER â The Denver Zoo has about 3,000 animals to feed, which in a year costs about $1 million. Although they say itâs been a challenging year, their commitment to keep these a...