Lots of folks swear by DE, but I have yet to see any proof that it helps, either as a cure or preventative for lice/mites. I`ve used Sevin dust for at least 50 years and it`s safe, even for dusting broodies with chicks. At times, in my illustrious chicken career, I have had infestations of the little blood suckers. The best thing I`ve ever seen for infestations is Adams Flea And Tick Dip. Mix as directed for dogs and dip the whole bird in it up to it`s neck. Swish it around a little and set it out in the sun to dry in a small wire inclosure placed on a tarp. Mix a little more and spray the coop, nests and roosts. You can still smell it after a month, so it`s sytil working good enough to get the hatchlings. I know you said chemicals are a problem, but sometimes(infestations) you just have to deal with it, or find someone who can.
To determine if lice/mites are present, pick a couple off the roost at night. Use a good flashlight and check the areas around the vent and under the tail. They are small, but you can see them in these areas with a good light. If one has them, they all do. Good luck..........Pop
To determine if lice/mites are present, pick a couple off the roost at night. Use a good flashlight and check the areas around the vent and under the tail. They are small, but you can see them in these areas with a good light. If one has them, they all do. Good luck..........Pop