I take it back: I guess I do have some advice to those with sick chickies. Please consider contacting dawg53 here on BYC. If Jim is the knowledge fairy on all hatching knowledge, then dawg is definitely the knowledge bible on chicken health & illness. Brace yourself, for his first recommendation might be to cull, but that is because he has seen alot of devastating diseases wipe out entire flocks. But he also knows tons about chicken ailments, diagnoses and how to treat for just about anything.
Good luck!
Good luck!