Hippopotamus diet and feeding management in zoos is a critical welfare factor, as inappropriate nutrition contributes to health problems and shortened lifespans compared to wild hippos.
Hippo diet welfare is an area where zoo practice has substantially improved as nutritional science has advanced. Earlier zoo diets high in fruit were appealing to visitors and animals but caused chronic dental and metabolic problems that reduced wellbeing and lifespan. The shift toward grass-based diets that more closely match wild hippo nutrition has improved health outcomes. Water temperature, depth, and quality are equally important welfare factors - hippos need deep enough water to remain submerged and cool. Appropriate social groupings and adequate space to emerge from water and rest are also critical welfare requirements.