Thanks so much for this info and the dipping pics, really helpful. I thought I just had a problem with too much preening or a rooster being a bit rough, until the hen with the bald patch really got bald ( most of the feathers on her back gone and on the sides of the patch, feathers broken off) Going to start with olive oil until I can get some sulphur. I have only ever seen it in powder form here, perhaps i can make a paste or also just dip her. Thanks again.