I had 21 RIR hens and 3 RIR roos. I noticed that some of the hens were getting feathers missing from their back. After reading on here about all the things that could cause this I got rid of 2 roos, made sure they were getting enough protein and didn't suspect mites because all were not effected. The 2 roos have been gone about 2 weeks and all hens are regrowing feathers. I learned it is easy to catch chickens off the roost and not easy to keep them in a cage when you open the door slightly, they don't go slow when leaving. I also learned they are hard to catch when on the run after being in a strange cage overnight. I also learned some more patience. They don't grow feathers overnight.
At least the remaining roo is occupied.
At least the remaining roo is occupied.