Dakshan why don't you post in the emergency section of BYC? Maybe someone can help you. Is there anyway you can take your chicken to the vet? I don't know if they need antibiotics but if you have any electrolites to give the sick hen. I'm sorry you are having all these problems. I wish I could help you more.
I'm so sorry. If a chicken is not drinking/eating, then you may be able to tube feed some liquids with meds. I did it for my Cuddles & she thankfully bounced back. I hated doing it, but it helped her through those worst couple days until she could eat & drink on her own. Not sure if I could have done it for an entire flock, but Cuddles is something special. Here are some links
I second all of this @daskhan I've had to do similar stuff to my birds, and some have bounced back. Lots of people have pretty good luck with electrolytes and b vitamins.Get 'em Gatorade/Pedialyte type stuff, but there are forms of electrolyte/multivitamins for poultry. I've been using Merrick's blue ribbon poultry electrolyte on mine (along with a stiff regimen of antibiotics for those who need them). Others on the forums have used Calk manna to great effect. In your case, I think antibiotics are probably called for, though this plague may be viral (in which case, there's pretty much nothing you can do but wait it out).
Try to figure out what the disease is
Once you figure it out, this site is an excellent place to find treatments:
Edited by Indyshent - 12/31/15 at 10:25am