Great apes and other primates are cognitively sophisticated animals whose welfare depends critically on mental stimulation. Tool use programmes, problem-solving enrichment, and technology-based activities represent the frontier of cognitive welfare for zoo primates.
Primate cognitive welfare is about more than preventing boredom — it is about providing meaningful challenges that engage the full complexity of evolved cognitive abilities. A chimpanzee capable of learning hundreds of symbols, planning tool use sequences, and engaging in political coalition-building needs an environment that exercises these capacities. The welfare cost of cognitive impoverishment in zoo primates is manifested in hair plucking, coprophagy, stereotypic rocking, and depression-like states that are widely documented in poorly managed facilities. Best-practice cognitive enrichment programmes integrate foraging challenges, social problem-solving, tool manufacturing opportunities, and technology-based activities into a rotating schedule that maintains novelty and challenge. Importantly, cognitive enrichment should empower animals by giving them agency and success — pure frustration without achievable challenge is not enriching.