I'm not sure I understood your post correctly. If I did,you're saying your hen has plucked out her breast /belly feathers? I'm new to this but I do know that when my broody hens are setting on a clutch,they do this to help keep the eggs warm. In other words,to incubate the eggs. As this is how the embryos mature. As far as the redness,my hens skin is pink. Maybe they plucked too hard. Irritated themselves. I'm sorry,I really would like to help! If I misunderstood,I apologize! And I hope you do find an answer to your issue.