This is my first year in raising 8 girls (now 10 months old) in Colorado. Today while it was a beautiful 58 degrees I let the girls roam. While they were out I noticed a bit of pink on one of the Bards. When I took further notice I saw she had feathers missing on her underbelly and under her wings. Their dusting has been limited to only a few times a week because of the snow covered ground. They live in a good size coop with sand on their floor that is cleaned twice daily. After seeing the loss of feathers I immediately white washed the nesting boxes with DE, changed the shavings, and sprinkled more DE with the pine. My girls live on a gourmet diet of organic fed, BOSS, yogurt, organic kale, and dried meal worms (plus of course adequate leftovers when available). I called my local feed store and was told I could turn my girl upside down and sprinkle her with ore DE. Another possibility would be to pick up some Permethrin (not too sure what that is) and sprinkle it all around. I did call some neighbors with chickens and heard that one neighbor had to put their bird down because of feather loss and a distended belly (UGH!!!). How I ended up caring so deeply for 8 chickens I will never know!!! I appreciate any advice!!! Thanks!!!