Hippopotamus Diet and Welfare | Animal Welfare Hub

Key Facts

Hippos are semi-aquatic grazers that consume primarily short grasses near water in the wild
Captive hippos frequently develop obesity and metabolic disease when fed inappropriate or excessive diets
Hay and grass-based diets most closely match wild hippo dietary composition
Fruit, vegetables, and commercial pellets are often used in captivity but can cause nutritional imbalance
Dental disease is common in captive hippos and requires regular veterinary monitoring
Dietary management in hippos must balance nutritional needs with behavioral feeding opportunities

Welfare Considerations

Dietary management is one of the most significant determinants of hippo welfare in captivity. Obesity from overfeeding or inappropriate diet composition is common and leads to serious secondary health problems including joint disease and metabolic disorders. Wild hippos consume primarily grass — a high-fiber, low-calorie diet entirely different from the fruit-heavy supplemented diets often used in zoo settings. Transitioning captive hippos to more appropriate grass-based diets and managing caloric intake improves long-term health outcomes and reduces the burden of diet-related disease that significantly compromises individual welfare.

What You Can Do

Support zoo welfare assessments that include nutritional management review for hippo collections
Advocate for grass-based dietary standards as the baseline for captive hippo nutrition
Encourage zoos to consult with wildlife veterinary nutritionists for species-appropriate diet formulation
Raise awareness that captive hippo welfare is significantly affected by diet and weight management
Engage with zoo governance about the welfare responsibility of appropriate dietary management for large herbivores