I found that one of my chickens had lice in September and since then I have dusted her twice with poultry dust and dosed her with ivermectin twice (through the skin) cleaned the coop and sprayed it down 4 times with permethrin and once with bleach. Her vent feathers still have the lice egg clusters on them but I'd bet money that she doesn't have lice anymore. Does anyone know if the lice eggs will just stay on the feathers if they are not viable? If they are on there should I assume they are viable? I looked at them under a microscope but since I don't know what I'm looking at, it didn't really help me. Does anyone have experience with this?