As one who has battled these pests all summer, has anyone ever white washed their coop as a means to help rid these pests? My ancestor's used to have their dairy barns "washed" yearly. I've used Sevin twice on them, Frontline Plus, in the beginning. Last night when I checked on them, they were shaking their heads again. Tonight we'll be firing up the wood stove for the first time this year, so I'll have wood ashes soon. I'm actually thinking of culling all 5 and burning the coop down, to start over. I have hens in another coop further away and so far, no little critters. But to start, I'd mix up a batch of the white wash and add Sevin in it, then paint and spray everywhere. My coop is 8 x 10 ft. Any thoughts? I'm sure that I brought the lice in myself, when I used to store my bedding under the lean to. There were bird nests overhead. I never gave it a thought. Now I'm just trying to get rid of them.