It all started with an idea that formed pretty quickly when I saw a youtube video on DIY cat runs. Discussed it with Tristan and a plan was formulated. The cat door goes through the dinning room window and it is well blocked off and wedged so no intruders can get in (or bugs). The cat run has many levels with artificial turf and wire mesh so they can’t get out and nothing can get in. We added a door so if they refuse to come in we can grab them.