Chimpanzees in captivity require complex social groups and rich environments to meet their profound social and cognitive needs.
Chimpanzee welfare in captivity requires genuine social complexity — not just the presence of other chimpanzees but appropriate groupings with stable relationships and individual choice. Understimulated chimpanzees develop hair-pulling, coprophagia, rocking, and self-injury. Meeting their social and cognitive needs requires commitment, expertise, and significant space.