We spent the day between Mr. Plywood and Lowes buying wood and supplies to build a small catio. Part 1 of its life will be at the bottom of the stairs (indoors) so both of the cats can get used to being around each other but unable to fight each other. Once we can get past needing a cage between them, it will move to the back window and give them a nice outdoor space safe from the city coyotes and the neighborhood bully cats. I see a couple intense weekends of building in our near future!