Multi-cat households create complex welfare challenges as indoor cats with incompatible social relationships are forced to share territory, with chronic stress causing significant health and behavioural problems.
Multi-cat household welfare failures are widespread and often unrecognised because they manifest slowly as health problems rather than obvious conflict. Cats that appear to coexist but are actually in chronic stress - avoiding each other, taking turns using resources, guarding areas - experience ongoing negative welfare states that owners may attribute to individual health problems. Assessment requires observation of which cats can and cannot share space voluntarily, checking for resource blocking behaviour, and monitoring urinary and skin health as stress indicators. Where genuine incompatibility exists, the welfare-optimal solution may be rehoming rather than management - a decision that requires honesty about whether the situation is serving the cats' welfare.