Hippo nutritional management in zoos requires understanding their unique digestive physiology. Dietary problems cause significant welfare harm that can be avoided with appropriate feeding programs.
Hippo dietary welfare in captivity illustrates how well-intentioned enrichment can cause harm. Fruits are favored by hippos and make attractive enrichment items, but their sugar content exceeds what hippos are adapted to process. Regular fruit feeding creates the conditions for dental caries and metabolic disorders that cause chronic pain and welfare compromise. Getting hippo nutrition right requires resisting the appeal of dietary items that hippos obviously enjoy but that do not reflect their evolved nutritional needs. Grass and hay-based diets are less dramatic than fruit offerings but represent genuinely welfare-positive feeding. This is a case where the dietary preferences of the animal and its long-term welfare interests are not the same thing.