Sue Ellen is a tiny chimpanzee who was born in 1968 and spent her first 15 years with Billy Jo in a human household. Though she was treated as a human child, she was also expected to work and so was used to entertain humans in the circus. When she became an unruly teenager, Sue Ellen was sold for research to New York University’s primate research facility LEMSIP. In her first year as a research chimp, Sue Ellen withstood 29 liver biopsies. In future years she would endure another 11 liver biopsies, 3 rectal biopsies and 4 lymph node biopsies. Sue Ellen would eventually be infected with HIV and was used repeatedly for reproducing chimp babies, all of which were destined for research. Though she was probably a very social and outgoing chimpanzee early on in her life, Sue Ellen is mistrustful of humans and prefers her chimpanzee friends, Pepper, Annie, and Chance. She spends most of her days playing, resting, eating, and socializing at the Fauna Foundation.