Advanced examination of behavioral rehabilitation science for great apes in sanctuary settings — what evidence-based approaches achieve for individual animals and what limitations remain.
Great ape behavioral rehabilitation reveals both the remarkable resilience of individual animals and the lasting welfare impact of early deprivation and trauma. Chimpanzees who enter sanctuary after years in isolation, performance, or research settings can develop functional social relationships and express natural behaviors — but rehabilitation is measured in years, not weeks, and some behavioral legacies of early deprivation persist throughout life. The welfare achievement of sanctuary rehabilitation is not restoration to wild-type behavior but development of good enough social function to allow participation in group living with appropriate companions. The behavioral science that supports this achievement is sophisticated, resource-intensive, and essential to welfare.