I just discovered that my flock of 30 chickens have lice. I was going to use Sevin dust 5%, but then I researched and decided against it. I had heard of using wood ash and rubbing it on them, has anyone had any luck with this method? If it helps, I have only seen poultry lice on them, but a few of the chickens match the list of symptoms for red mites word-for-word. Thanks.