Hamsters and other small rodents are among the most welfare-compromised pets in the UK, with housing that typically falls far short of meeting their behavioural and physiological needs.
Hamster welfare science has advanced significantly in recent years, documenting the range of behaviours that hamsters require and the welfare consequences of denial. Hamsters kept in standard pet shop cages exhibit high levels of stereotypic bar-biting, a clear indicator of welfare compromise. Insufficient running opportunity from small or absent wheels causes stress and boredom in animals that run many kilometres nightly in the wild. Bedding depth matters for digging and burrowing — shallow bedding denies hamsters the ability to construct burrow systems they instinctively require. Germany has responded to this science with legally enforced minimum standards that dwarf typical UK recommendations.