Mila was born in the wild in 1973, but at nine months she was taken into captivity at London Zoo. She ended up at Honolulu Zoo for a brief period before the Whirling Brothers Circus brought her to New Zealand in 1978.
Auckland Zoo staff are now helping care for Mila while the SPCA and the Ministry for Agriculture and Fisheries try to work out her future.
Dr Schofield, 42, had been in talks with California-based sanctuary Paws, which has said Mila is still welcome.