CINCINNATI -- The Cincinnati Zoo is celebrating another milestone for its famous premature baby hippo.
The zoo said Wednesday that Fiona has hit 1,000 pounds (454 kilograms).
The zoo acknowledges reaching that weight mark is more of a sentimental milestone since full-grown female hippos weigh about three times that. Senior keeper Jenna Wingate tells WVXU radio that it's "a big deal" because the zoo didn't know whether she would survive at birth.
Born nearly two months early in January 2017, she was 29 pounds (13 kilograms). That's about a third the size of a typical full-term Nile hippo. She also was unable to stand or nurse.
A zoo staffer hand-milked her mother Bibi, and Smithsonian's National Zoo helped develop a special formula. Nurses from Cincinnati Children's Hospital put in a hippo IV.
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Cincinnati Zoo's premature hippo Fiona hits big milestone
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