Chimpanzees are among the most cognitively complex animals kept in zoos and their welfare depends critically on living in stable, appropriate social groups that allow the expression of their rich behavioral and social repertoire.
Chimpanzee welfare in captivity is one of the most challenging and consequential areas of zoo animal welfare because of the species's cognitive complexity and the depth of social bonds they form. Chimpanzees in inappropriate social situations, whether isolated, in unstable groups, or without adequate space for normal social negotiation, show behavioral abnormalities including self-injurious behavior, chronic stress vocalizations, and stereotypies that reflect profound psychological suffering. Good chimpanzee welfare requires multi-individual stable groups with appropriate age and sex composition, large and complex spaces that allow the avoidance and privacy that social dynamics require, cognitive enrichment that engages their problem-solving abilities, and management teams with deep knowledge of individual personalities and relationship histories. The legacy of biomedical research means many captive chimpanzees carry trauma that requires specialized rehabilitation approaches.