In the spring I noticed that my rooster was being mean to my original 4 girls, thought he was the reason why they were starting to loose some back feathers, put him in freezer camp. I thought that their feathers would grow back, but they didn't. I checked and checked but couldn't find bugs, not sure what is going on, It is getting worse. We've raised 37 babies this spring/summer and all has gone well with the integration. They seem fine and all free range together. I have dusted them with poultry dust twice in the past month. Tonight since it rained and they were wet, I bathed the 3 girls. They are still eating and laying. And I bought DE this month too. Might have to go all out cleaning and disinfecting everything around the chickens. Maybe I am missing something.......... Here is a picture after the bath, she is the worst. What can I do to help them out?