I just pm'ed you a homemade remedy. Until you can get a medication specific to Cocci.
All your babies need to be treated for Cocci. No need to put them down, just do your best to save them.
Everyone's set up is different. If you can bring them in, off your soil, it will help. Keep their...
I'm with chickenlady on this.... you are discribing cocci.!! In this hot, wet weather we are having it is running rampid!!!
Please, read this link's information:
http://www.shagbarkbantams.com/page7.htm