Found lice on my chickens this spring. I was advised to use Eprinex, which I did *twice* to no avail. Then switched to the poultry powder (Permetherin). Cleaned out the coop and sprinkled poultry powder and DE over the roosts and under nesting material. Switched to sand in the bottom, followed up with treatment 10 day later. They went away for a few weeks, but now I see those buggers back on their bottom fluff. I'm so over this! Anyone else have other ideas? I hate dumping eggs in the summer when they are laying so good, but I have two other groups of younglings that I'm going to have to treat now too. Ugh.