a few (2 hens, 1 rooster) are losing feathers on their backs?? I have gone out to look for mites/lice at night a few times, but I just don't SEE anything. I read that you want to distinguish between Northern fowl mite and red mite before treating because the treatment is different for each. Does anyone have recommendations for a regular mite/lice dusting schedule? Or do you just treat on an as needed basis? I put DE in the shavings in the coop, on the roosts, and in their dusting area regularly already. They are "free range" most of the time. THey have only had to stay inside like 3 times this winter, due to really cold temps. Could it maybe be pecking? Any ideas of what can be going on here with the feather loss on their backs?