My chickens have lice, so I was looking at products I could use. I'm not going to use Sevin dust or ivermectin, because I know there's less-toxic stuff out there that works. I was looking at permethrin dust the other day and found thishttp://www.bugspray.com/item/eco_exempt_d.html It was attached to a page on permethrin dust, claims to be an organic alternative. Anyone have experience with this product? I want to choose only the safest treatments for my flock, but I will use the regular permethrin if I have to.