Hi there!
First, I love this game.
But there I was with our favorite reporter following Dogmeat in the chase of.. The scent of a bad guy. We arrive at the location, she says I should give Dogmeat a break, and we proceed (just me and her) by the parking lot to infiltrate the building. Since there was no "dialogue" with Dogmeat to send him somewhere , I thought he would be there were we left him. He wasn't. And I did not find him back at Diamond City, nor at Sanctuary ( my home and thriving community). What now? I am playing on Xbox, no way to type hack codes into the game. I do not want to replay the three hours it took me to go through the building..

Any thoughts?

Have you tried fast-travelling?

I know when I head off to SPOILERY LOCATION, because of the necessary travel methods my follower gets left behind. But wherever I fast travel to when I leave, Hancock is magically there.

Also, whenever companions disappear or get stuck, fast-travelling is a great way to 'reset' them, even if you just travel to somewhere you are already standing.

If you have never left Dogmeat at Sanctuary before, his default home is probably still Red Rocket. I would check there.

Also, I don't know if you are aware of it, but if Dogmeat is dismissed, he hangs out at a Dog House. Unless you have done some redecorating, the dog houses in Sanctuary are all in back yards, so he may be there in Sanctuary, just in a backyard somewhere, out of sight.

Best of luck!