Well. I went out to let the chickens out today and out he came running, and was walking around the run. It's been cool and wet, so I didn't open the door til after noon. I've got 2 suddenly-sick last night kids (what is going on!?!) so I didn't get out to the feed store til 5. When I went out to bring him in to a box I'd gotten lined with shavings, etc so isolate and medicate him, he was on the ground in the run, couldn't seem to get up. We had some heavy rain and I suspect he got knocked down, sodden, a coulnd't get up. Kicking myself for not checking in again after I let them out.
They gave me something called Vet Rx which seems to be canada balsam, camphor, essential oils of rosemary, oregano and diluted in alcohol and corn oil. I'm not sure how often to dose him, and I'm giving him straight drops based on the last story in the insert, but I only gave him a few drops once. And the rest have been electrolytes and vitamins.
He's on a heating pad in the living room, and has been snuggled up with various family members. He's swathed in towels and drying off.
He was in pretty grim shape when we brought him in. He seems better now, but still pretty weak. We'll see how it goes. I am realistic that his chances aren't good, but hopeful anyway.