I bought a Bantam Cochin mix that has lice. Today I washed her with flea and thick shampoo for cats ( she was FULL with lice) and tomorrow I will do the Sevin dust treatment. - How soon after the first dust treatment I can do it again and how many times? - How long do I need to keep the chicken in quarantine? - After the lice is gone what chances she has to get it again? will the extermination be permanent if my chicken area and coop are kept in very good conditions? ( for only 11 Bantams I have a 15x30 covered fenced run, I keep hay on the bottom of the coop and change it twice/week) I had my Bantams since they where only few days old and they never had any parasites, this is new for me so I'm freaking out a little bit. I want to make sure I do everything the right way and don't exposed my girls to any parasites.