When dusting, you have to redust the chickens 7-10 days later to kill external parasites hatched from eggs. If you dont, you'll have a continual problem with the bugs. You also have to treat coops, nests, roosts in the same manner. I've read that coconut oil will remove lice eggs.Ok my chickens have lice and I've tryed giving medicine that was subscribed by the vet. It seemed to work, but now the lice and mites have returned. I heard seven works well, but I also heard it doesn't get rid of the eggs, how do you get rid of those???????????? PLEASE HELP!!!!!!!!!!!