Guinea pigs are social animals that require companionship, space and appropriate diet for good welfare, with common husbandry practices often failing to meet these fundamental needs.
Guinea pig welfare requirements are often underestimated because of the animals small size and apparently docile nature. Their complex social needs — living in stable groups with established hierarchies — are poorly served by typical pet shop environments and husbandry advice. Vitamin C deficiency, caused by inadequate fresh vegetable provision, causes scurvy symptoms including joint pain and lethargy. Overcrowded cages with inadequate enrichment prevent the social navigation and exploration that guinea pigs need. The Swiss approach — legally requiring social housing — demonstrates that welfare requirements for small animals can be taken seriously in law and practice.