Chickmate, there is no need to apologize, lice can get in anyone flock no matter how clean they're kept. Quarantining any new birds is just part of responsible husandry and my new birds are kept 100 yards from my flock. Yesterday I was watching the new birds and thought I need to check them for lice as they both were exhibiting signs of infestation. I will be dusting them later today and again don't feel that you have done anything wrong.