Guinea pigs used in research are highly social animals whose welfare is significantly compromised by the isolation and barren housing that remains common in research settings.
Guinea pig welfare in research settings suffers from the combination of social deprivation and environmental inadequacy. As highly gregarious animals, guinea pigs isolated from conspecifics show physiological stress responses that affect experimental outcomes and represent genuine suffering. Their need for hiding places — fundamental to prey animal psychological security — is rarely addressed in standard laboratory housing. Vitamin C deficiency from inadequate dietary supplementation is a welfare failure that remains surprisingly common despite being easily preventable. Meeting the social, spatial, and nutritional needs of laboratory guinea pigs is both an ethical obligation and a prerequisite for obtaining reliable research data.