She's an Australorpe laying hen +/- 8 months old and her chest is sunken, her black feathers have strange white flecks and she doesn't move around much. She's stopped eating and drinking. We've been using a sports bottle and various vitamin/salt solution to keep her going. We de-flead all the chickens 2 months ago and last week. She's been inside for 2 days now. She also seems a bit lopsided. Please help! Any advice would be great!