Territorial behaviour in cats is natural and important, but can create welfare problems in multi-cat households and neighbourhoods.
Understanding territorial behaviour as a normal feline need — rather than a behavioural problem to suppress — is essential for welfare-positive cat management. Cats that cannot express appropriate territorial behaviour through marking, patrol, and occasional boundary assertion develop stress-related health and behaviour problems. In multi-cat households, territorial needs drive many inter-cat conflicts and can be significantly reduced through resource separation, adequate space, and management of access to contested zones. Outdoor territorial conflicts between neighbourhood cats are normal but can create chronic welfare problems in cats that cannot avoid repeated encounters. Cat-safe fencing and environmental modification that reduces hostile encounters supports welfare without eliminating natural territorial behaviour.