The question of whether cats should have outdoor access or be kept entirely indoors is one of the most debated topics in companion animal welfare. Both options carry welfare costs and benefits that depend heavily on the individual cat and their environment.
Outdoor access provides cats with environmental complexity, opportunity for natural behaviour, and reduced risk of frustration-driven stereotypies. The welfare costs — road mortality, predator encounters, infectious disease exposure, and conflict with other cats — are significant but highly location-dependent. Dense urban environments with heavy traffic represent much higher risk than rural areas. Indoor-only keeping requires substantial environmental enrichment to prevent boredom, frustration, and obesity. Compromise solutions — secure garden enclosures (catios), supervised outdoor access, or territory-familiar neighbourhood access — can provide behaviour opportunities while reducing mortality risk. Individual assessment based on the cat's personality, age, and local environment should guide decisions.