Domestic rats are highly intelligent, intensely social animals whose welfare needs are significantly underestimated by most first-time owners.
Domestic rats are among the most cognitively sophisticated rodents kept as pets, with social complexity that has been formally documented in experimental studies: they help companions in distress, discriminate between fair and unfair treatment, and show play behaviour associated with positive affect. Their social needs are non-negotiable — a single rat, however much human interaction it receives, lacks the constant companion interaction it requires. Their short lifespan means that the quality of each week matters enormously; even modest improvements in environment and social provision have significant proportional welfare impact.