just noticed this on a chicken i am plucking. i had checked my chickens before for parasites and never saw anything (my hens haven't been laying and i have been trying to find the problem). the hen who is in this picture didn't have many, and looked very healthy otherwise, didn't see big bundles of eggs on feather shafts or anything else. they are free range and all dust bathe regularly. i am thinking diatemaceous earth... any other advice, if this is indeed lice?