One of my friends has two cats, normal moggies, and when she lived here,
(now lives in spain) she put a harness on each one attached to a washing
pole by a length of rope, so that they could roam in the garden. I asked her why, she said so they don't climb. ????
When mini-me had two new kittens we did adopt this, so they had the freedom and to get used to their surroundings.
My older cat 18, goes in and out as she pleases, mostly in, unless I'm out
in the garden, but always in at night.