Colorado zoo wants you to guess the weight of a hippopotamus

COLORADO SPRINGS, Colo. — One of Colorado’s cutest animals is growing up.

Omo, a 21-month-old hippopotamus at Cheyenne Mountain Zoo, will soon weigh more than 1,000 pounds.

The Colorado Springs zoo said the public can guess when Omo will hit that mark with the winner getting a prize. Guesses can be made on the Cheyenne Mountain Zoo Facebook page.

The zoo said Omo is weighed opportunistically — or whenever he walks onto the scale separately from his 3,100-pound mom, Zambezi — so it doesn’t happen every day. Zookeepeers will be…