Older , partially sighted and arthritic , in 1998 Oliver ended up at a spacious , open - air cage at Primarily Primates ; the sanctuary 's director at the time also decided to resolve the question of Oliver 's taxonomy .
Older , partially sighted and arthritic , in 1998 Oliver ended up at a spacious , open - air cage at Primarily Primates , in Bexar County , Texas . 
 The sanctuary 's director at the time also decided to resolve the question of Oliver 's taxonomy .