Multi-cat households can be enriching or stressful for cats depending on group composition, resources, and management — and chronic social stress is a significant and often unrecognised welfare problem.
Multi-cat households are one of the most common sources of unrecognised chronic stress in companion cats. Unlike dogs, which have evolved to live in complex social groups, cats are solitary by nature and form stable groups only among related individuals in resource-rich environments. Unrelated cats forced to share space and resources experience chronic low-level stress that manifests as feline idiopathic cystitis, overgrooming, hiding, and inappropriate elimination. Providing adequate resources and spatial separation significantly reduces this stress. Owners should be vigilant for subtle signs of inter-cat tension and seek feline behaviour specialist guidance.