Cats are obligate territorial animals, and territorial conflict between cats in multi-cat households or neighborhoods is a major source of stress and injury. Understanding feline territorial needs improves welfare.
Feline territorial stress is chronically underrecognized in companion cat welfare. Owners often interpret cat aggression as personality conflict rather than a sign that resources — space, resting spots, litter boxes, feeding stations — are insufficient. The recommended minimum ratio of litter boxes to cats is n+1, but many households fall short. Cats forced into proximity with incompatible housemates develop chronic stress responses including cystitis, over-grooming, hiding, and reduced feeding. Outdoor cats that cannot avoid territorial rivals may avoid going outside, losing important exercise and mental stimulation. Management strategies include spatial separation with gradual reintroduction, vertical space provision, pheromone diffusers, and in severe cases, rehoming one cat to restore welfare for both animals.