Patti was born in 1972 at the Dallas Zoo. She’s been living at the Milwaukee County Zoo for more than 50 years. The median life expectancy of a hippo in human care is around 37 years ...

On Nov. 9, veterinarians noticed she appeared lethargic after spending time in the hippo habitat and pool. After assessing Patti, her health declined and the decision was made to humanely euthanize ...

a river hippopotamus, was humanely euthanized on Sunday, Nov. 10. Patti marked her 55th birthday in February. She was born at the Dallas Zoo and arrived in Milwaukee in 1972, living at the zoo for ...