Indoor cats need proactive enrichment to maintain physical and psychological welfare without outdoor access.
Indoor cats deprived of appropriate enrichment develop welfare problems including over-grooming, redirected aggression, urine marking, and obesity. The hunting sequence of stalk, chase, pounce, and kill must be stimulated through play even in cats with full bellies. Inadequate vertical space in multi-cat households creates resource competition and stress. Cats need predictable routine and choice about when to interact to maintain psychological security.