Hi there....do you mean she hasn't been eating for a month ? Generally,they only stop eating a few days before laying. Then they scratch around quite a bit. I've seen female eat right up to the day of laying, but the longest I've seen a female stop eating is about a week before. But never a month....they generally eat a ton in the 2-3 weeks before laying. Is she big + healthy, fat ? Can you post a pic, or at least weigh her? She may have a health problem going on. Was she bred or are you anticipating infertiles ?