Multi-cat households frequently generate chronic stress from resource competition and social incompatibility that owners often fail to recognize.
Many multi-cat households appear peaceful but contain chronically stressed cats whose welfare is significantly impaired. Elevated cortisol, suppressed immune function, and increased disease risk are measurable even without obvious aggression. Welfare improvement requires environmental management: providing one litter box per cat plus one extra, multiple feeding stations in separate locations, vertical space for escape and observation, and hiding spots. Where cats are fundamentally incompatible, managed separation rather than forced cohabitation is the ethical choice.