Guinea pigs are among the most misunderstood companion animals, with widespread welfare failures stemming from inadequate space, social isolation, and inappropriate diet.
Guinea pig welfare failures are systematic and preventable. Single guinea pigs experience chronic loneliness — their complex social communications require partners to express. Small cages prevent exercise needed for cardiovascular and musculoskeletal health. Diets heavy in pellets and low in hay cause chronic dental overgrowth — a painful condition that prevents eating and ultimately is fatal. Vitamin C deficiency from vegetable-free diets causes scurvy — painful and debilitating. Guinea pigs hide pain and illness so effectively that owners may not recognize suffering until an animal is critically ill. Large enclosures, companionship, and hay-based diets address most welfare failures simultaneously.