Guinea pigs are popular pets often kept in conditions that do not meet their social and space requirements, resulting in widespread but avoidable welfare problems.
Guinea pigs are frequently marketed as easy, low-maintenance starter pets that require minimal space — a characterisation that is inaccurate and welfare-damaging. A solitary guinea pig in a small hutch with a pellet-heavy diet is experiencing deficits across multiple welfare dimensions: social isolation from a species that is highly gregarious, space restriction preventing normal activity, and nutritional inadequacy from a diet that does not support dental health. The consequence of widespread poor keeping is a veterinary caseload dominated by preventable conditions — overgrown teeth, scurvy, obesity, and loneliness-induced stereotypies. Consumer education before purchase is critical, and retailers selling guinea pigs have a responsibility to provide accurate care information rather than simply facilitating impulse purchases.