I've gone through the forum about lice and mites and I got a lot of helpful information, I'm still confused. I have a pullet who is sleeping/taking care of her mom's second set of 2 1/2 mth chicks, then I have a hen with 9 , three week chicks and another hen sitting on eggs. I have 2 roosters and 30 hens. I live in rainy, cold weather and i've read to wash them and then remove nits. When I get one chicken done, is it safe to put them back in the coop? What do I use to treat the coop? Do I need to repeat this process? I also read to use Sevin or other things, but isn't that poison and isn't that dangerous for my chickens and effect the eggs? I'm truly overwhelmed and I know how hard it is to remove lice from humans , but the thought of doing over 30 chickens.....tear!