Update
John Henry came home this morning.
He's actually fairly mobile, which I was worried about as he was having a lot of trouble getting around at the vet school (they have slippery floors). And he's interested in food and water and things he can't do yet.
There's not much else to report at the moment. He moves. I run around and try to make sure he doesn't get anywhere he can't get out of. I worry about pills and food and getting in and out of the house. We'll see how it all goes from here.