Old age?

Hi
It sounds to me as if she has finished her laying, if it was her who passed the lash then she is definitely finished.
You can expect a very satisfied feeling and a happy chicken who will enjoy her retirement in peace. 

Hi Bexy
A lash is a lump of tissue from the hen's reproductive tract. This generally means that the bird has come to the end of its egg laying life. They can go off colour including moulting at this time and look a little stressed. They will still have an enjoyable life especially without the hassle of laying eggs for the rest of their lives.