I have a healthy hen who is loosing feathers on her belly and tonight I observed that even her chest has a bald spot! This has been going on for quite a while - months! Her skin is not broken but it does look somewhat red and irritated. I have tried to put some natural salve onto the area. She is active and happy all day. She loves to forage, her color is good, her eyes are bright but she keeps loosing feathers. I do not think that this is molting. I have seen some of my other hens molt and it did not look like this. I have several hens and she is the only one with this extreme feather loss. If anyone has any idea what could cause feather loss on the belly and chest, please tell me! I am clueless!