I am still learning so bear with me... My BSL pullet who is 8 months old seems to be losing feathers and she is not laying eggs anymore. I notice the feathers in the coop mostly. She has lost all the feathers on her face and most on her neck. I have looked closely at her skin and don't see any bugs (although I am not sure what a mite would look like .) I keep DE all over the yard and in the coop/nest boxes. She acts normal, except for the not laying eggs part. She eats and drinks fine. One of the other hens has taken on the role of "rooster" and occasionally jumps on the three other hens for a few seconds and bites their necks. I don't think she would account for all the facial feathers missing. You can see all the pin feathers coming in where the other have fallen out. Thanks in advance for any wisdom.