My 11 day old chicks are scratching themselves, and when I saw the older hens do that a while back, it turned out they had lice. I powdered the older hens and thought it was under control until a few days ago, when I saw them scratching again. So I dusted them again. But now, I'm seeing the little chicks scratch themselves. The baby chicks live in a back bedroom, in a brooder, and have had no contact with the older hens except through me, my wife, and my five year old daughter. Maybe we brought in the lice on our clothes or something, though we run a pretty clean household over here. Anyway, my question now is -- can I dust the little ones the way I dust the older hens? Should I provide the little ones with a little bowl of sand to dust bathe in? And a second question: other than changing our clothes and washing hands before we go in to see the little chicks, is there anything else whe can do to halt the spread of lice between chicken flocks?