The Khao Kheow Open Zoo was overrun with Moo Deng fans on the first of four days of activities marking the hippo’s birthday.

Thousands of fans have flocked to a Thailand zoo to celebrate the first birthday of Moo Deng, the baby pygmy hippo that's ...

Moo Deng, the famous pygmy hippo, turned one at Khao Kheow Open Zoo in Thailand. The celebration featured a 20-kilogram cake.