Guinea pigs are among the most popular small mammals kept as pets, yet their social and environmental needs are frequently unmet. Understanding their ethological requirements transforms the standard of their care.
Guinea pig welfare is undermined by a gap between their popular image as easy, low-maintenance starter pets and their actual requirements. As obligate social animals, guinea pigs kept alone experience genuine psychological suffering measurable through behavioral indicators. The standard pet store cage — typically 60x30cm — provides insufficient space for the active locomotion these animals engage in given opportunity. Vitamin C deficiency is preventable but remains a significant cause of welfare problems due to inappropriate diet. The combination of social isolation, inadequate space, and nutritional insufficiency that characterizes many guinea pig keeping situations represents a preventable welfare failure. Countries and jurisdictions that have developed specific welfare guidelines for guinea pigs have made meaningful progress in communicating these requirements.