The debate over indoor versus outdoor cat keeping involves genuine welfare trade-offs between the enrichment of outdoor access and the significant mortality and injury risks cats face from roads, predators, and disease.
Cat outdoor access involves a genuine welfare trade-off that requires thoughtful assessment rather than a universal prescription. Cats with outdoor access engage in natural behaviors including hunting, territory marking, and environmental exploration that provide significant positive welfare experiences. But the mortality and injury risks from traffic, disease, and predation are real and substantial — cats allowed to roam freely near busy roads face markedly reduced lifespans. The welfare calculus depends on the specific environment: a rural property with low traffic and few predators presents different risks than an urban setting with heavy traffic. Compromise solutions — catios, supervised outdoor time, cat-proof garden fencing — provide many of the enrichment benefits of outdoor access while substantially reducing the most significant mortality risks. Indoor-only cats require compensatory enrichment investment to meet their behavioral needs without outdoor access.