The debate over indoor versus outdoor cat keeping involves genuine welfare trade-offs - catios and supervised access offer compromise solutions that address both safety and behavioural needs.
Cat outdoor access welfare involves genuine competing considerations. Indoor cats avoiding outdoor risks face potential welfare compromise from reduced environmental complexity, limited exercise and inability to express hunting, climbing and exploration behaviours. Outdoor cats express these behaviours but face mortality and injury risks and contribute to wildlife mortality. Catios represent an elegant compromise - outdoor air, enrichment and visual stimulation without free-roaming risks. Their welfare value is significant when properly designed with climbing structures, vegetation and adequate space. The wildlife welfare consideration also matters: free-roaming cats cause significant harm to wild bird and mammal populations.