So I just opened my nesting boxes to check for eggs and I found one of my two year old Black Australorps upside down in the nesting box. It scared me at first because it looked like she was headless (it was her vent sticking up). She hopped up when I touched her and behaved "normally" but I picked her up to check her for signs of being sick, She had no signs of lice or mites on her, I've seen no worms in any of the droppings. She is, however, missing just about all of her feathers on her underside from her chest to her vent and the skin below her vent is very red. Also, the color of her feathers on the lower half of her body have gone from being black to a light brown... I don't know how well she's laying, all my girls seem to have dropped in production as of late. Any ideas? Thanks for any advice!