I have 3hens and 2seem fine however the other has stayed in the laying box for three days straight now and only gets out when I take her out and make her eat and drink. She laid the first day so thought she was just broody and kept taking her out of the box but she hasnt laid today or yesterday and has hardly eaten or drank anything. Her crown is really floppy but doesnt look discoloured any ideas what might be wrong with her? He has just turned 6months old