I have a year and a half year old hen that since Spring just hasn't been right. She lost all of the color in her comb, stopped laying eggs, started always looking disheveled and fell from top hen to the bottom of the pecking order. At first I thought she was just molting, give her time. Well it has been several months now and no change. We have checked her for worms, checked her for mites, her vent is clear, her poop looks normal, she eats and drinks fine. We feed scratch and peck normally but have also given free access to feather fixer feed pellets. Her eyes are clear, there are no signs of anything weird on her skin and she doesn't have any wounds or anything like that. We have done rounds of probiotics, electrolytes, acv, and garlic and periods of time without anything extra just to see how she does. None of these have seemed to make a difference. It's been so long since she laid an egg that her bones have closed up to 1 finger apart. Last year she was the head hen and my best layer. Any ideas??? She isn't getting better but she also doesn't seems to be getting worse either.