Multi-cat households are a major source of feline stress and behavioral problems, with intercat conflict causing chronic anxiety that impairs welfare and drives many of the most common cat behavioral presentations.
Intercat conflict causes chronic welfare harm through persistent stress for subordinate cats who cannot escape conflict and must navigate a shared territory with a dominant cat that controls access to resources. The stress response drives stress-related disease — idiopathic cystitis, overgrooming leading to alopecia, reduced immune function — that creates direct welfare harm beyond the psychological stress itself. Owners often miss the subtle signs of conflict because confrontations between cats are frequently non-contact: staring, blocking pathways, and displacing each other from resources without overt fighting. The welfare solution requires both resource provision that reduces competition and space management that allows adequate separation. When incompatibility persists despite management, the welfare-appropriate decision may be rehoming one cat to a home where they can live without the chronic stress of an incompatible relationship.