I can’t see any pin feathers, the area looks like it’s just been plucked. One of our other hens has started losing feathers on her belly, again can’t see any pin feathers & the area is very red. They have mite treatment in their water once a week plus mite powder in their house. One difference I have noticed is that recently one of the hens seems to be cracking an egg nearly every day by laying on it. She then obviously has egg all over her. Could she be pulling her feathers out by trying to clean the egg off? Another thing I’m wondering is whether they are possibly bored? Any advice greatly appreciated