Found lice on one of my chickens. Long brown/gold fast moving bodies that have created a lot of scab on my chicken's feathers. (Do you agree they are lice?) I dusted the chicken with DE to the point that she wafts white when she fluffs her feathers yesterday. Today I think there are many fewer bodies moving through her. I bought poultry dust (pyerthin 5%) and will dust her tomorrow if you think I should. I thought some of my chickens and two guinea fowl were preening but now I think they may have the lice. Only two of my chickens are comfortable with being picked up and examined. So one of them is the one I described above and the other has no issues at all with lice. I have one chicken that does the gapeworm silent throat thing. Should I dose everyone in the water and should I use Ivermectim? If so, what should the dosage be since I can only find it for horses and the local TSC said that chickens are hardy and shouldn't need to be wormed..... Thanks to all of you for all your knowledge.