The Cincinnati Zoo and Botanical Garden's baby hippopotamus is growing new teeth. The zoo posted video on Wednesday, 10 May,, showing zookeepers giving Fiona her mouth check and finding new incisor tusks. Fiona was born six weeks early in January at just 29 pounds, well below the normal 55-110 pound birth weight for hippos. Her weight now tops 200 pounds. She's been under the care of the zoo's staff, away from her parents, since her birth, and the care team is preparing her for spending time outside, a reunion with her parents and meeting zoo visitors.