Environmental enrichment for zoo animals has evolved from simple novelty provision to sophisticated programs designed to meet species-specific behavioral needs and promote positive welfare.
Zoo animal enrichment has transformed from providing objects to a sophisticated science of meeting species-specific behavioral needs. Effective enrichment allows animals to exercise species-typical behaviors including hunting, foraging, territory marking, and social interaction. Feeding enrichment that makes animals work for food addresses the behavioral deprivation of receiving food without effort. Environmental complexity providing choice and agency reduces stress and stereotypic behavior. Social enrichment matched to species requirements including appropriate group composition and management of social dynamics is critical. Olfactory enrichment using scents is particularly effective for carnivores. Cognitive enrichment using puzzle feeders and problem-solving devices addresses the intelligence needs of great apes, bears, and other cognitively complex species. The benchmark for enrichment success is that animals show their full behavioral repertoire with minimal stereotypic behavior.