If I was told her true age this hen is around 2 yrs old. Since the summer she has been acting old and fragile. She spends most of her time in the coop resting, she has a hard time walking (as if she's aged), she no longer lays. I finally moved her to her own coop ans run and no longer let her out to free range because I am sure my young and quite healthy roosters would have killed her. She DOES have a good appetite and drinks fine. Her stool is on the looser side and greenish. Now my question is this black spot on her face. Is this anything??