Last night I discovered lice eggs (clumps at the roots of the feathers) forward of the vent of our rooster. [By the way, thank you to the authors for the timely original-posting and photo plus responses at https://www.backyardchickens.com/forum/viewtopic.php?id=397665 ] [Also see http://www.hencam.com/henblog/2010/05/of-lice-and-hens/ ] Unfortunately, I'm wondering whether or not I can successfully eliminate (or even control) lice in the coop. - first, because the floor is dirt and very uneven, with some rocks that I put in it around the edges of the coop in order to discourage our birds from their tendency to excavate near the edges of the coop (and thereby to inadvertently create subterranean entry-ways for predators). - secondly, because the coop is of mesh-on-frame construction, and there are plenty of places between mesh and frame that I cannot clean out, especially near the base. I'm thinking of simply raking out the existing straw, dusting heavily with food-grade diatomaceous earth (white powder) which I have, and then putting down new straw. Regarding the birds themselves, I wonder whether dusting with food-grade diatomaceous earth alone will be sufficient. This is starting to make me feel itchy, literally - even though I wore overalls while inspecting my birds and then laundered them! Also, I'm concerned about possibly breathing in a little diatomaceous earth - even if I wear a surgical mask over my face while dusting the coop and birds.