We have figured out theat they came from the straw I put in with them a couple of days ago. They are gray/white about a 1/4 the size of a piece of rice. Or red... I assume that is once they bite something. I noticed them all over me (well I say all over but they were on my arms and a couple liked my phone) a few hours after I held one of my Buff Orpingtons. My husband found them to be crawling all over our eggs last night when he got eggs. Today he put seven 5 dust in the nesting boxes and this evening no mites on the eggs. He has to do a 12 hour shift tonight and the next 3 so we won't get the chance to treat them all individually till Monday morning. I am dying inside. He did put seven dust in the coop floor and DE and wood ash is always in there but he put more. Plus he put seven dust in their dusting area and let them run the yard to dust too. He grabbed up the Rooster and gave him a thourough going over TWICE and said he didn't see anything on him, but he dusted him with seven dust down to the skin anyway. They were dusting themselves and I didn't really see any of them looking in severe discomfort. One had the occasional itch but not as much as me... Last night I itched all night and couldn't sleep and felt something biting me all night (in reality I did only find like 4 red marks on my skin and I have only killed 4 or 5 of them ON me). I am TERRIFIED of bugs. I put frontline on all 3 of my dogs today. I washed all my bedclothes in scalding hot water and dried them on the hottest setting my dryer has. I put seven dust on my couches and let it sit probably 2 or 3 hours while I did all this. Please HELP!!!