Inter-cat conflict and resource competition in multi-cat households is a leading cause of chronic stress, disease, and behavioral problems that significantly impair feline welfare.
Multi-cat household stress is one of the most common and undertreated welfare problems in companion cats. The fundamental issue is that domestic cats did not evolve as obligate social group-livers — they can form affiliative relationships but do not require them and are not equipped with the behavioral toolkit to resolve serious conflict. When incompatible cats are forced to share space and resources, the subordinate cat experiences chronic stress that presents as house soiling, reduced grooming, hiding, reduced food intake, and frequent illness. Owners often miss the conflict because it is expressed through avoidance and subtle intimidation rather than overt fighting. The welfare solution involves both resource provision — enough of everything that competition is reduced — and in some cases, permanent separation or rehoming of incompatible individuals.