I was examining one of my girls today, and I parted her feathers in an area where they were a little sparse; she has just come out of molt. I saw some short feathers with a whitish buildup all over them, they were crusty looking. Then I saw a little ivory mite looking thing crawl past. Feather mites? They have their own dust holes outside in the run in the covered area...should i make an indoor box and fill it with DE? We're organic here so won't be using any chems. How do I keep them from laying in the dust bath I make them? Its very very cold here....-15C today, so I want to make sure that the whole flock doesn't get them, if they do already. I dusted the girl in question with DE but can't dust the rest of the flock as they aren't as tame as her.