I have 3 broodys sitting on eggs (2 at day 19, one at day 15) in a separate area of the coop. I usually have them in dog crates and open the doors once/day for them to get off the nest. This time I've left all their doors open to allow them to eat/poop when they want. I noticed that one of the broodys had gotten off her nest 3 times/today (really unusual) so I locked her in the crate thinking I'd open her door tomorrow. When I just looked in she wasn't on the nest. I looked at the eggs and they are covered in mites! Haven't seen any mites on the rest of the flock. So now what do I do? I put her 5 eggs under the other two hens (I hope there's enough room) and dusted her for mites. Her chicks are set to hatch tomorrow/Monday so do I try to keep her in the crate (with new bedding/dusted). What about all these chicks about to hatch?