“…Despite these advantages, many owners limit outdoor access to protect cats from traffic accidents, ingesting poisoned food, wild animals, for fear of losing them or because, in some countries, outdoor cats are killed by law to protect wildlife [ 34 ]. On the other hand, recent research has provided evidence that cats kept exclusively indoors recorded higher scores in quality of life compared to cats with outdoor access, as reported by their owners [ 38 ]. Research in this field provided important information on the factors that affect the well-being of cats but has some limitations due to the different methodologic approaches (e.g., questionnaires or ethological tests) and the testing environments (e.g., shelters or laboratories, cat homes) in which they were performed [ 30 , 33 , 39 ].…”