Guinea pigs are highly social animals with complex needs. Meeting their housing requirements significantly improves welfare outcomes for these popular companion animals.
Guinea pigs in small cages without companions are chronically stressed and behaviorally deprived. The inability to run, explore, and perform natural behaviors including foraging and social grooming represents a significant welfare failure that is extremely common in pet-keeping. Solitary housing causes chronic stress that appears as depression-like states, lethargy, and reduced responsiveness. The disconnect between how these animals are typically sold and what they actually need means many guinea pigs live substantially compromised lives despite owner intentions.