Try feeding her some chopped egg, and you can mix some of her chicken feed with a lot of water plus a tsp of plain yogurt to try and get food and water into her. Feel lots of chickens' crops to know what they are feeling like when they should start out empty in early morning, gradually filling up during the day with food and water. Add some poultry vitamins or give her some poultry NutriDrench or Poultry Cell 2 drops daily by mouth. This has been going on for a long time if she has a crop impaction, so we need to try and help you figure it out.