Tetracycline knocks anthrax and bubonic. You can get it at the farm and feed store under the brand name Terramycin for a couple bucks.
My bad anon, my tetracycline post isn't really on point with what you want to know. Just wanted to pass on the info.
Do a detox and take activated charcoal.
The dosage is labeled by weight of the animal. It's meant for anything from Horses to chickens. Same stuff they give humans, though. Just mix with water and serve by weight. It's good for many things, and easy to get for emergency stash.