Indoor cats are susceptible to chronic environmental stress from inadequate resources, social conflict, and lack of control over their environment; addressing these reduces welfare problems.
The indoor environment for cats can be either a welfare asset or a welfare liability depending on its design. Cats in well-resourced indoor environments with ample vertical space, multiple feeding stations, appropriate numbers of litter trays, and hiding spaces experience lower stress than those in environments where resource competition is constant. In multi-cat households, social tension is often invisible to owners — cats rarely fight openly, expressing conflict through subtle displacement, resource guarding, and stress-related illness. Designing the indoor environment to meet each cat's needs for resource access, privacy, and control over their social environment is the primary tool for managing chronic environmental stress.