Food delivery in zoos has evolved from simple provisioning to a sophisticated welfare science. How food is provided affects time budgets, behaviour, and mental state as much as what is provided.
In natural settings, finding food requires most of an animal's time and cognitive effort. Zoo provision of food in bowls or at fixed times eliminates this challenge, leaving animals with large amounts of unstructured time and no occupation for their food-seeking motivation. Feeding enrichment restores some of this occupation — scatter feeding requires searching, puzzle feeders require problem-solving, whole prey items require natural feeding behaviour. The welfare benefit is not just reduced boredom but active engagement of cognitive and physical capacities that constitute positive mental states when expressed.