The question of whether cats should have outdoor access involves genuine welfare trade-offs between natural behavior expression and the significant risks outdoor environments pose to individual cats and wildlife.
The outdoor access debate presents a genuine welfare dilemma. Cats are hunters with strong motivations to patrol, stalk, and explore that are frustrated by permanent indoor confinement — environmental enrichment helps but does not fully substitute. However, the risks outdoor cats face are serious: infectious disease, parasites, fights, predation, road traffic, and human cruelty cause significant suffering and shortened lives. The wildlife welfare dimension — billions of birds and small mammals killed annually — represents a massive external welfare cost. Managed outdoor access through catios, leash walking, and supervised garden time offers a compromise that provides enrichment while reducing both individual cat and wildlife welfare costs.