Noticed last night it just stood around. Got it to eat and drink some this morning, and went on hunt for Corid and other meds.
Hit every place I could find (Co Ops and other farm stores) within 75 miles with no luck. Only vet I know of semi local was closed today. By the time I got home this evening, it had passed.
Watching the others like a hawk now. I separated the sick one this morning, but still checking them constantly.
Will be better prepared next time (I hope) and will keep a better eye on them