Capybaras are the world largest rodents and highly social animals that thrive in zoo settings when provided appropriate group size, aquatic access, and environmental complexity matching their semi-aquatic lifestyle.
Capybaras in zoos generally fare well when kept in appropriate group sizes with water access, but welfare problems arise in solitary housing, inadequate pool depth, or inappropriate social groupings. Dominant males may injure subordinates in crowded enclosures. Interactive capybara exhibits that allow visitor contact need careful management to prevent habituation-related stress. The social bonds between capybaras are strong — separating bonded individuals for veterinary or management purposes causes measurable distress. Hot spring facilities in Japan that house capybaras often provide better thermal comfort but may compromise other aspects of the behavioral repertoire.