Rats are highly intelligent, social companion animals whose welfare needs are frequently underestimated despite extensive research demonstrating their emotional complexity.
Companion rat welfare requires acknowledging their cognitive and emotional sophistication. Rats form complex social hierarchies, play extensively, and form strong bonds with both conspecifics and human companions. Solitary keeping denies them social interaction that is fundamental to their psychological wellbeing. Mycoplasmosis, a respiratory bacterial infection common in rats, requires regular veterinary monitoring as it causes chronic welfare compromise from breathing difficulty. The short lifespan means welfare neglect has compressed consequences - a poorly cared for rat may experience welfare compromise throughout most of its brief life. Providing enriched, spacious, socially appropriate housing with regular veterinary care dramatically improves rat welfare.