Fritz, J., Howell, S. M. 1993. Psychological wellness for captive chimpanzees: An evaluative program. Humane Innovations and Alternatives in Animal Experimentation 7, 426-434.

Authors describe the "Wellness Program" of the Primate Foundation of Arizona (PFA) devoted to producing physically and behaviorally normal chimpanzees. Psychological well-being is a major focus. In this paper, the authors present protocols specific to the provision of stimulation enrichment, a description of techniques utilized, evaluation procedures for both the protocol and individual assessment of well-being, and staff and training guidelines. The protocols are applicable for both large and small facilities.