Indoor cats face unique welfare challenges from environmental restriction. A thoughtfully enriched indoor environment can meet cats' physical and psychological needs while keeping them safe from outdoor hazards.
Indoor cat welfare depends on actively compensating for what the outdoor environment provides: territory, prey, social stimulation, and unpredictability. Without these substitutes, indoor cats commonly develop boredom-related pathologies including over-grooming, stress cystitis (feline lower urinary tract disease), aggression, and anxiety. Environmental enrichment for cats must engage all senses: olfactory enrichment through catnip, silver vine, and novel scents; auditory stimulation through nature sounds or window bird feeders; and tactile enrichment through varied substrates and textures. Food puzzles transform meal times into problem-solving challenges that engage the hunting drive. Outdoor enclosures ("catios") offer a compromise between indoor safety and outdoor stimulation for cats that become distressed in fully indoor environments. In multi-cat households, the physical and social environment needs careful design to prevent chronic conflict, which is a major and often invisible source of cat suffering.