I just logged in to ask about a similar situation with our silkie, Cloud. She didn't want to go into the coop, and was hiding under it. We got her out, and she just stood so pathetic and lethargic on the floor of the coop when we put her in.
I went out with a strong flashlight and saw that her bottom was bloody from being pecked clean of most feathers, and that she had diarrhea. Her vent is very open with thin green poo around it and down her wounded bottom. She's now just standing, not sitting, but I can't feel any unusual lumps or anything to indicate that she's eggbound.
Her crop is not full - I'm not sure she's eaten much - all I can feel in her crop is sand.
I gave her water by spoon as she would not drink and after a few spoonfuls she refused more.
She is right there by the food, and isn't making any movement to go eat. At this moment I cannot isolate her as the chicken isolation pen is currently housing a shi'tzu! Well, he was abandoned last fall and we can't trust him not to mess in the house at night, so he's in the dog crate that was formerly used to isolate the chickens.
I don't have anything else at the moment that could work.
Anyway, we washed up her bottom and treated the wounds with bluekote. And she just stands there looking droopy and sick.
Should I give her antibiotic? (I have Aureomycin in a packet that we have for an old feral tomcat that occasionally comes here with a bulging head and abscess, probably from his teeth and we give him some in tuna oil for 14 days to help the old boy.) No gatoraid or any other electrolyte stuff here at the moment, though for Cloud the Silkie. Not sure what else to do for her until morning.