Every morning we have a routine. I open up the back porch to let him back outside, he'll pop through the cat door move around to the steps and have a scratch on the entry steps. He then begins his systematic patrol of his territory boundaries, marking where necessary and pausing for a long drink of water (apparently he believes the water on the back porch must be poisoned!)
Saturday morning he made a bold statement. I went to the back porch to let him free as normal, but he didn't dart out his cat door as usual. Instead he went for the back door, he wanted to come inside with me. I picked him up and carried him inside. I held him for a bit and then carried him to the front porch, where I put him on the front porch shelf window where he could again go explore his yard. He got down and did a quick running sniff of the open door and then went to the front door to be let inside. He's made the choice to forgo his yard for the inside kitty life. I cannot ignore this decision.
Saturday he spent nearly all day inside (with exception for when I popped out for some errands).
He did mostly great! I realized I needed to back off and let Theo and him work it out, which is scary, cuz it could mean a tussle. They are figuring it out.
Oliver, laying next to me as I write this post.