Chimpanzees are our closest living relatives, with cognitive and social complexity that demands exceptional zoo management standards for adequate welfare outcomes.
Chimpanzee welfare requires the most comprehensive and sustained institutional commitment of any zoo species. Their cognitive sophistication means that welfare deficits manifest in complex behavioral pathologies — self-mutilation, depression-like states, abnormal social behaviors — that persist long after conditions improve. Social group management is extraordinarily complex: chimpanzee politics involve alliances, betrayals, and status competitions that require careful observation and skilled keeper intervention. Cognitive enrichment must be varied and challenging — bored chimps are suffering chimps. The retirement of former biomedical research chimps presents particular challenges, as many carry trauma from social deprivation in early life. The welfare of these animals reflects directly on our ethical relationship with our closest relatives.