Capybaras are the world's largest rodents and highly social semi-aquatic animals. Their welfare in zoos requires appropriate group sizes, water access, and complex social environments.
Capybara welfare in captivity is primarily determined by the quality of social housing and water access. As highly social animals, capybaras suffer from isolation or very small group sizes that prevent normal social interaction and hierarchy formation. Large mixed-sex groups that allow stable social structures provide the richest welfare environments. Water access must be sufficient for full submersion, as capybaras use water for thermoregulation, escape from perceived threats, and social interaction. Grazing opportunities on appropriate vegetation supplement browse provision and support natural foraging behaviour. Capybaras are generally calm and can develop positive relationships with keepers, making training for routine health monitoring straightforward in well-managed facilities.