I noticed my barred rock hen has bald spots on the shoulders and rear above her tail، I diagnosed her and found she had a small hard cone like tumor growing on her back, but this was in different area than where she is missing feathers. She lays eggs and seems fine, but I couldn't figure out why she was missing feathers until yesterday. I saw her prooning like the other chickens, but when she got to her shoulders and back, she would pluck out her own feathers. And several times she bit and scratched her face on the strange growth as if it was irritating her. The growth is a couple of inches below the area on her back that she is plucking. I would really appreciate any ideas from you as the vets are super expensive in la. I spent almost 700 dollars on another chicken a couple of years ago, and can't afford that again. But these are my game, so if I can't figure out how to help her myself, I will be forced to see a vet. I appreciate any guidance.