You should start a new thread in the emergencies section. You have tagged on to an old thread, and won't get noticed here. At the beginning of the emergencies thread, there is a list of questions to include that are helpful to figure out what is wrong.
Hope your hen is still okay. Have you checked her crop? If it is full and hard or full and squishy, she may have an impacted crop or sour crop. There are treatments for each. Worms are a common problem as is coccidiosis.
Post back here and let me know when you start a new thread.