Guinea pigs are among the most commonly kept small pets, yet their welfare needs are frequently misunderstood, resulting in widespread suffering in domestic settings.
Solitary guinea pigs show signs of chronic stress and reduced welfare that are often invisible to owners. Guinea pigs housed in commercially sold cages that are too small cannot express natural behaviours including running, foraging, and social interaction. Good welfare requires companionship, large housing, unlimited hay, and regular veterinary attention for dental issues.