The question of whether cats should have outdoor access is one of the most debated in feline welfare. Outdoor access provides enrichment and behavioural expression but exposes cats to significant risks including traffic, disease, and predation.
The indoor-outdoor cat welfare debate involves genuine trade-offs rather than a clear welfare-optimal answer. Free outdoor access provides meaningful enrichment and behavioural expression but imposes significant mortality risk — particularly from traffic — that shortens lives substantially. Indoor-only cats live longer but may experience reduced quality of life if their environment lacks adequate complexity and stimulation. The welfare-optimal resolution for most cats in urban areas is supervised outdoor access through catios, enclosed gardens, or leash walking that provides outdoor enrichment without free-roaming risk. For cats already adapted to outdoor life, abrupt transition to indoor-only living can cause significant stress. The conservation implications of outdoor cats add another welfare dimension — the welfare of wild prey species must be factored into the overall ethical calculation.