Guinea pigs are highly social animals frequently kept alone in inadequate conditions. Understanding their needs helps improve care and advocates for better standards in the pet trade.
Guinea pig welfare is one of the clearest examples of the gap between retail norms and actual animal needs. Commercial cages sold specifically as guinea pig homes are typically far too small for even a single animal. Guinea pigs kept alone in inadequate cages suffer from social isolation, insufficient movement, and often nutritional deficiency through vitamin C inadequacy. Switzerland has addressed this through legislation requiring social housing; other countries rely on voluntary welfare guidance that is frequently ignored. The combination of inadequate housing, social isolation, and poor nutrition creates chronic suffering for a very large number of pet guinea pigs.