Foraging enrichment for laboratory primates addresses one of the strongest behavioral motivations in these animals, providing cognitive engagement and positive welfare outcomes that passive food delivery cannot achieve.
Foraging enrichment addresses the single largest behavioral deficit of laboratory primate housing: the removal of the activity that occupies the majority of wild primate waking hours. Providing food in a bowl eliminates the effort, problem-solving, and time investment that foraging represents in natural environments. Primates fed this way have hours of behavioral time that natural foraging would have occupied — time that fills with stereotypic behavior, aggression, or inactive depression-like states. Puzzle feeders convert feeding into a behavioral engagement opportunity that activates the cognitive systems evolved for foraging challenges. The welfare benefit is consistent across species and housing types. The practical barrier is staff time for designing and maintaining enrichment programs — an investment that is justified by the welfare improvement and the research quality benefit of animals with lower stress baseline.