Primates in research facilities require enrichment to meet their complex behavioral needs. A growing evidence base guides effective enrichment program design.
Primate enrichment research has produced clear evidence that the most impactful welfare interventions are social and foraging-based. Social primates housed alone or in unstable groupings show high rates of abnormal behaviors reflecting chronic stress. Social housing eliminates the greatest single source of welfare compromise in primate research. Foraging enrichment that distributes food throughout the day in ways requiring active search mirrors natural time budgets and dramatically reduces stereotypies and self-injurious behavior. Behavioral management training — teaching primates to cooperate voluntarily with blood draws, injections, and health assessments — reduces procedural stress and eliminates the need for chemical restraint in many contexts. Research facilities that implement comprehensive enrichment programs achieve better animal welfare and often better research validity, as unstressed animals show less biological variability.