I am concerned that my 2 week old chicks may have mites/lice. They seem to scratch themselves a lot and have some white flakes on them. They have not been with any other chickens, I hatched them in the house and they are still in here! I have added shavings to the brooder that were stored in the orginal bag inside the hen house. I am not sure if critters could have been in them or not. So my question is, how young can they be around seven dust? I was thinking since the brooder is a plastic bin that I could put a light dusting down and then some clean shavings rather than dust them down since they are so young. What do you guys think?