you are describing some of my strongyloide symptoms. dandruff like flakes in legs and scalp hairline; also how about your private area hairline that's another spot they hit on me. lots of hairloss on lower legs and ankles. the feathers are the molts(skin of larvae) after they tear thru your hair. Do you have lots of heat style rashes and pimples when the larvae travel thru your skin. It seems to me the meds run the new egg hatches south to my feet were they either die or molt. farm vet told me the feather like dandruff I see is not because I am crazy it is the molts or dead larvae. http://www.actavetscand.com/content/48/1/18/figure/F5?highres=y