hi everyone. i asked on here a little while ago about a problem i had discovered with mites on my chickens. i followed the instructions you gave me, thouroughly disinfecting the house and putting down the mite powder, and also dusting the chickens, but i am still finding the mites on the chickens. how often should i actually dust the chickens themselves? i didn't want to be doing it too often if it could harm them, but am now concerned i haven't done it enough? also, should it be quite fast acting in killing the mites, or is it usual to take a while to clear an infestation? i have not had this before as i am new to chicken keeping, and am keen to sort it out before my chickens start to suffer. Thanks in advance.