Tigris and Filou are indoor born indoor cats. It's because of the traffic we have here -so many cats in the neighborhood are being found dead on the streets -so our neighbor's little black Nero with 9 months, or a beautiful Silver Tabby. I couldn't stand that, although I would wish, they could climb on trees and catch more dinner than just moths and spiders.
However they have a balcony with a cat net around and lots of plants -they enjoy it a lot in summertime.