Indoor cat welfare depends critically on behavioral enrichment that meets cats' cognitive, physical, and predatory behavioral needs in the absence of outdoor access.
Indoor cat welfare is not automatically inferior to outdoor cat welfare - it depends entirely on the quality of indoor enrichment provided. A barren indoor environment causes genuine behavioral and psychological harm through unmet predatory, exploratory, and physical needs. An enriched indoor environment that provides varied foraging opportunities, interactive play, vertical space, and sensory complexity can support excellent cat welfare. The key is understanding what cats need - not just food, water, and safety but active behavioral engagement - and systematically providing it.