Ive had my chickens since early march, When I bought them they were around 8-10 months old. They were missing some feathers on their back and close to the tail. I was told they were molting. Since then it has only gotten worse. They look really ragged and I don't know what to do. I'm sure it's not protein deficiency because of how and what I feed them. I'm down to mites or anti-pick. Any ideas would be great. Also, I consistently get 5-6 eggs per day from them(6 hens).