Western lowland gorillas in zoos are highly intelligent great apes with complex social structures. Meeting their welfare needs requires sophisticated, research-based management.
Zoo gorilla welfare is significantly determined by the quality of social group composition and management. Silverback males require careful management since dominance relationships between males can lead to serious aggression in insufficient space. Mixed-age, stable groups with appropriate sex ratios more closely mirror wild social structures and support better welfare. Dietary welfare is also critical — replacing processed foods with browse, leaves, root vegetables, and fibrous plant material addresses gorilla digestive physiology and prevents the obesity-related heart disease that reduces zoo gorilla lifespans. Foraging enrichment that requires time, manipulation, and problem-solving keeps gorillas cognitively engaged. Research into gorilla welfare has advanced understanding of positive affect indicators, enabling welfare assessments that go beyond absence of stereotypies to documentation of flourishing.