I have an 18 week red sex link. This morning she was fine, but this evening I noticed she has a droopy tail and just stands in one spot. Her poop looks normal her eyes are bright she drank some water I gave her and ate some bread I threw to her. What could be wrong? I checked her for being egg bound but didn't feel anything. She hasn't started laying yet. Her comb and wattle are red still. Does anyone know what could be wrong?