Pet rats are intelligent, highly social animals whose welfare is frequently compromised by solitary housing and inadequate environmental complexity.
Pet rat welfare is frequently underestimated because rats are seen as low-maintenance pets. In reality, they have sophisticated social and cognitive needs that require significant owner commitment. Solitary rats suffer genuine psychological distress — they are obligate social animals. Minimum housing should be pairs; groups of three or more provide richer social environments. Cage size recommendations are often inadequate — rats need space for vertical climbing, running, and exploratory behavior. Respiratory disease from mycoplasma requires management and eventually palliative care. The short lifespan means rats age visibly and require increasing veterinary attention in their second year. Owners who commit to meeting rats' social, environmental, and health needs find remarkably rewarding relationships with highly intelligent companions.