Hello! It's been a really long time since I've been to this website but I have a question that I'm confused about. All of my girls (8 Brown Shavers) have been pecking each others feathers out of their backs and the soft fluffy feathers from around their bottoms. They all look ridiculous. They have a large pen and they get to free range around our large backyard for about 2 to 3 hours per day. Do you think they are doing this because they are bored, unhappy or have they developed a habit? Perhaps they have mites? I have checked for mites but I can't see anything. I haven't treated them yet but will get some pestene tomorrow and treat them ASAP. Does anybody have any other ideas as to why my girls might be doing this? They are not my first flock I have had a flock of 10 hens in the past and none of them ever behaved in this way and they were also Brown Shavers. These girls are just over a year old. Thanks for your help.