Oh, hon, I'm so sorry, but you were a real trooper! Some would see it as extreme, to cull the entire flock, but this way, you know. You are an official country girl, I'd say. (((hugs)))
Oxine is really the very best thing. Bleach would be my next choice. If it was cocci, I'd say use old fashioned ammonia, but bleach will do. Not sure exactly how long you should wait, but since it will take awhile to get up your flock again, however long it is should be enough. If I can help rebuild by sending hatching eggs, I'll be happy to do that. You probably know I raise Barred Plymouth Rocks and could provide crosses with BR as sire.