You do not need to clean their coops when you kill the lice on your chickens. Everything read online says that lice spend their whole lifecycle on one chicken, not in the environment. So they are not like mites....you don't have to go hog wild cleaning the coop. All my girls had baths today to get rid of their lice, and they are going to get Sergent's Natural Flea and Tick on them to kill the eggs that may hatch. Mmmm. They smell delicious!