I put a container of dirt in the brooder for my chicks to dust bathe in. I have 2 mixed breed chicks and one of them has mostly white on her. She absolutely LOVES dust bathing! The problem is that she is turning a dirty grey because of the dust bathing. They are 4 weeks old and they go outside in the coop with 4 13 week old chicks during the day. I bring them in in the evening and they always dust bathe right after coming inside. I just brought them in and they are dust bathing and now the air is filled with DUST! What should I do?