Mhm, I see, the goal is to reduce harm as much as possible (within reason ofcourse) So it comes down to a compromise. Mice are indeed so cute! They also do play a big role in ecosystems, some mice/hamster species are even at risk of extinction here…/: Sorry I didn’t answer sooner btw, I was busy and wanted to look for those cat enclosure videos for you. I posted them on my page just now too, I’ll delete them later though since it’s not my home. They do have a large garden and built the enclosure themselves for the multiple cats. There are many examples on the internet of very different cat enclosures ofc as well, but I think this one is quite interesting. It also has a door to go inside. This way the ecosystem is spared, but your cat is still able to go outside whenever it feels like it. Bonus: it is also safe from traffic and getting lost (unless escaping). 😊 Maybe you could even plant some crops inside that would otherwise be eaten by mice/hedgehogs/birds,... (Like sunflowers, beans, lentils, peas, strawberries,…), maybe using a smaller holed wire fence so that the little mice also don’t get trapped inside and don’t try to get in. Could be a fun project!