Whether to keep cats indoors or allow outdoor access is a significant welfare debate, balancing the enrichment benefits of outdoor exploration against the risks of road traffic, predation, disease and wildlife impacts.
The indoor-outdoor cat debate involves genuine welfare considerations on both sides. Outdoor access provides enrichment through exploration, predation opportunity and social contact that indoor environments rarely replicate. The risks of outdoor access — traffic, disease and predation — are real and cause preventable death and injury. Indoor-only cats without adequate enrichment develop welfare problems including obesity, boredom-related aggression and stress. The welfare-positive resolution involves providing indoor cats with enriched environments — large spaces, climbing structures, puzzle feeders, window access and social interaction — that meet their welfare needs without the risks of outdoor exposure. Supervised outdoor access via catios and harness training provides intermediate options.