Many of my hens (and even my rooster) are missing feathers on the front of their neck. On some of the hens that are worst-off, they are missing feathers all the way around their necks. Most of them are only missing some right under their "chins," though. We have 1-3 hens that are not affected at all. Some of the hens are also missing feathers on the top of their back. Our theories have been either (a) mites, or (b) the healthy-looking ones are pulling out the feathers of the "plucked" ones (including the rooster). We don't think it's the rooster, primarily because they begin missing feathers from the front, not the back, of their neck. Some background on our flock: We have 10 hens and 1 rooster now. It's a mix of Americaunas and Buff Orpingtons. The rooster is an Americauna. It seems that the Americaunas are worse-off than the buffs, as all of the unaffected ladies are Buffs. We raise goats (that we rent out to clear land for people as our primary business), but the goats are mostly separate from the chickens at this point. We have a small, mobile coop that we built like this. We move them maybe once every month or two. We always intend to move them more often, but the goats tend to eat up a lot of our time. We originally had 19 hens and the roo, but a local fox made himself known. Now, rather than letting them roam totally freely like we were before, we have them contained in some poultry netting and an electric charger when they are out during the day. Thinking it was mites, (and feeling desperate) we sprayed some permetherin (sp?) around the coop and into crevices in there. WE moved the coop maybe 100 yards around the house before doing this. We also sprinkled some DE around the coop. If it's mites, what should we do? If it is them picking on each other, what is the best strategy for dealing with that? We have the means to quarantine one at a time, but do we quarantine the ones that are being plucked or the suspected pluckers? If pictures will help, I can get some this evening or tomorrow morning. Thanks in advance for your help!