Providing nutritionally complete diets that also allow natural feeding behaviour is one of the most challenging and important aspects of zoo animal welfare management.
Zoo animal nutrition is both a science and a welfare intervention. Animals provided with nutritionally complete but behaviourally unsatisfying food - like a monkey given fruit puree rather than whole fruit pieces - are fed but not fulfilled. Encouraging natural feeding behaviour through food presentation, appropriate textures and appropriate foraging time is as important as nutritional composition. Obesity from excessive concentrated food provision is common in zoo animals and reduces welfare and lifespan. The best zoo nutrition programmes integrate dietary science with behavioural enrichment, treating food as a primary welfare tool not just a maintenance requirement.