She just passed away while I was holding her.
Is there any way to treat with Corid and a broad spectrum antibiotic? Does this sound like something an antibiotic would help with? The other 4 bantam girls in her flock seem fine (not that it's going to prevent me from being proactive in treating them from whatever it could be)


Are the others eating/drinking/pooping = all normal? If so, then I would probably treat with the Corid, but I wouldn't give antibiotics prophylactically.
You may want to consider sending the body to the state lab for necropsy/testing, to find out the cause. Probably Raleigh or Monroe are the 2 closest labs to you (NC has 4).
http://www.ncagr.gov/vet/ncvdl/