Guinea pigs are highly social rodents with specific space and companionship needs that are frequently inadequately met in typical pet care, causing preventable welfare problems.
Guinea pig welfare is frequently compromised by inadequate housing and the failure to provide companionship. A solitary guinea pig in a small pet store cage - a common situation - experiences both social deprivation and spatial restriction that cause chronic stress. The welfare needs of guinea pigs are easily met with appropriate knowledge: a large enclosure, a bonded companion, unlimited hay, fresh vegetables, and vitamin C supplementation. Public education about these needs is the most important intervention for improving companion guinea pig welfare.