Hippos are highly aquatic animals whose welfare depends critically on water access, appropriate social environments, and management of their complex social dynamics.
Hippos without adequate water access experience physical discomfort from skin drying, potential overheating, and inability to perform normal aquatic behaviors. Restricted to inappropriate social groupings - particularly single males - hippos may develop stereotypic behaviors or become chronically stressed. Older zoo hippos without heated pools in cold climates suffer during winter months. Positive reinforcement training for voluntary veterinary procedures has transformed management welfare, allowing health checks without chase and capture that previously caused extreme stress.