I have been reading up on lice, and mites . Best idea yet I have found is put chicken in a trash bag head sticking out and shake with what ever it is your dusting with in the bag. De, seven ect.
Good luck. I has a rat so bought a big rat trap. 8 dollars guaranteed to kill on contact. 2 days later hear thump thump thump . No more rat or trap . Guess he took it with him. At least for now he is gone. As is the trap.