Guinea pigs are highly social animals commonly kept in isolation in inadequate housing, with specific health vulnerabilities including vitamin C deficiency and dental disease that owners frequently miss.
Guinea pig welfare suffers from a combination of societal normalisation of inadequate housing, widespread ignorance of their social and dietary needs, and the perception that they are low-maintenance starter pets. The reality is that guinea pigs kept singly in small cages, fed primarily dry pellets without fresh vitamin C sources, and denied floor time experience chronic welfare deficits across multiple dimensions simultaneously. Single-housed guinea pigs cannot engage in the social grooming, play, and companionship that is central to their wellbeing; vitamin C-deficient guinea pigs develop painful joint disease; guinea pigs in inadequate housing cannot express their full behavioural repertoire. Treating guinea pigs as genuinely complex, social animals with specific welfare needs — rather than low-maintenance cage pets — transforms their quality of life.