But must control this outbreak and save both the pullets and these irreplaceable eggs. Hope you got your mite situation in hand by now. This is a natural plant product that does not seem to affect the animals. You have to get the all natural kind because some of the commercial products have carbamates in them. I never noticed any bad side effects.
Higher animals can, pretty much, eat the stuff, but it kills insects.
The worst that I've heard is that some people are allergic to it. I don't know how to wash eggs that are allready incubating, but commercial hatcheries used to fumagate with formaldehyde once before and once during incubation. If the embryos could survive that I don't think a little seven dust or whatever you used is going to affect them. I wouldn't wash them unless you really sludged them up. The action of the hen turning the eggs on fresh nesting material will polish the eggs nicely.