Litter box provision in multi-cat households requires careful attention to number, location, type, and substrate to prevent inappropriate elimination and resource competition that cause welfare stress.
Litter box welfare in multi-cat households encompasses both physical elimination needs and psychological welfare around resource access. Cats that cannot easily access a litter box, or who are blocked by other cats from box use, experience anxiety and elimination urgency that are welfare-significant states. Resource guarding of litter boxes is a common aggression trigger in multi-cat environments and a primary driver of inter-cat conflict. Adequate box provision removes a key competitive resource, reducing chronic stress for all cats in the household and preventing the inappropriate elimination that leads to owner frustration and potential relinquishment.