Lioness at Oklahoma City Zoo has started to grow a mane

OKLAHOMA CITY, OKLAHOMA (WIVB) – A curious case is puzzling veterinarians at the Oklahoma City Zoo.
Bridget, the zoo’s 18-year-old African lioness, has sprouted a mane- a feature typically only seen in male lions starting when they are around one year old, caused by increased testosterone hormone.
The Oklahoma City Zoo is also home to a  male lion, six-year-old Hubert who has a robust, dark mane and Tia, Bridget’s 18-year-old sister, who remains mane-less. Bridget&rsq