Indoor-only cats live longer, safer lives than outdoor cats, but restricted environments frequently fail to meet feline behavioural needs. Environmental enrichment that meets cats' needs for hunting, climbing, hiding, and social interaction is essential for indoor cat welfare.
Indoor cats face a welfare paradox: the controlled environment that extends their lives also constrains the behavioural repertoire that provides positive welfare states. Cats are obligate hunters — the predatory sequence is a core motivational system that generates positive emotional states when expressed and frustration when blocked. Environmental enrichment that replicates key elements of feline natural behaviour — puzzle feeders for foraging, wand toys for interactive hunting play, vertical climbing structures, window views with bird feeders, and hide spaces — measurably improves welfare indicators. Multi-cat households require particular attention: cats are not naturally social animals, and cohabitation in resource-restricted environments produces chronic low-grade social stress that manifests as urine marking, redirected aggression, and hiding. The number of resources should always exceed the number of cats.