Capybaras are the world's largest rodents, highly social and semi-aquatic. Their welfare in zoo settings depends on appropriate group sizes, water access, and environmental complexity.
Capybara welfare in captivity is primarily determined by social housing and water access. These large, gregarious rodents form stable social groups with complex internal relationships; solitary or paired housing creates chronic social deprivation. Pool access is not a luxury but a biological necessity: capybaras use water for thermoregulation and as a refuge from stressors. Facilities that provide large groups, appropriate pools, and diverse terrestrial environments demonstrate capybaras thriving behaviorally — playing, vocalizing, and engaging in affiliative interactions. The exotic pet trade has created additional welfare concerns: capybaras kept as household pets typically lack social companions and appropriate environments, leading to behavioral deterioration and health problems. Supporting accredited zoo populations while opposing the exotic pet trade reflects appropriate welfare priorities.