the people in changsha knew they had a large turtle in their zoo, but they didn't know it was a yangtze giant soft-shell turtle. a circus performer had sold her to the zoo in the 1950s. they gave her raw meat to eat. the raw meat kept her body healthy, but it was not good for eggs. she laid eggs every year, but they never hatched. this was because no male turtle had fertilized them. it was also because she needed to eat foods with more calcium. raw meat did not have enough.