Hamsters are among the most commonly mishoused companion animals. Understanding their behavioral biology — including their strict solitary nature and large space requirements — is essential for providing good welfare.
Hamsters are among the most commonly poorly housed companion animals. The small wire cages sold in pet shops — far below recommended welfare standards — cause measurable chronic stress. Stereotypic bar-chewing indicates frustration and psychological suffering. Syrian hamsters kept with companions — a common misunderstanding — face serious injury or death from conspecific aggression. Disrupting hamster sleep by handling during the day causes chronic stress. The gap between commercial husbandry standards and evidence-based welfare recommendations for hamsters is one of the largest for any companion species. Education and better retail standards would substantially improve millions of hamster lives.