Viviana’s keeper, trainer, and best friend, Erin, gave viewers a sneak peek into the hippo’s world on the most important day of the year. January 22 was Viviana’s birthday! This year ...

Cincinnati Zoo's portly princess Fiona is celebrating her 8th birthday. On this special day, the city's famed hippo is celebrating another major milestone, social celebrity status. Sign up for our ...

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She was the smallest Nile hippo to survive and was 25 pounds lighter ... The Zoo says Fiona may be able to get outside and accept birthday greetings if it's warm enough. Either way, the zoo ...