Multi-cat households are common but frequently create chronic stress for cats due to resource competition, social incompatibility and inadequate space management.
Chronic low-level stress in multi-cat households is invisible to most owners — no fighting, no hissing — but measurable in elevated cortisol, reduced play behaviour, and increased hiding. Cats that cannot avoid each other in a shared territory develop sustained stress responses that compromise immune function, digestive health and urinary tract health. The solution is space management: ensuring every cat has exclusive access to key resources, multiple exit routes from every room, and sufficient elevated territory that each animal can rest without visual contact from others. Human empathy for cats as social animals often leads to keeping more cats than welfare allows.