It's probably not the best idea to expose them to the insecticide. Aside from it not being healthy for them, also remember as they will be eventually laying that what goes in will come out and I doubt you would want that in your eggs. You could sprinkle some diatomaceous earth in the box with some pine shavings to help with the gnats, flies and any other bugs with an exoskeleton. Other than that I've read that hanging those vanilla car scent trees around them will help although I don't have any experience wtih that. GL