Hello I discovered one of my girls showing weakness and very emanciated when I picked her up. Usually she does not let me handle her and runs. Last night wasn't going in with the others. So picked her up, she did not fight me and felt no muscle just bones in her chest. Isn't eating, crop feels empty, energy seems low. Pale comb. Checked for lice and mites nothing. Haven't seen signs of worms but will keep checking to see if she poops. I imagine little output if not taking in much. We have 15 birds. And several areas for feeding so I know she isn't being pushed out for food. I have separated her with own coop and notices she isn't touching food or water or favorite treats. Any idea what it could be?