I put sulfur in the dust bath to prevent mites and lice. I also put it on my pants to repel ticks
http://entomologytoday.org/2016/07/18/battling-chicken-mites-with-bags-of-brimstone/
http://entomologytoday.org/2016/07/18/battling-chicken-mites-with-bags-of-brimstone/