I'd like to save eggs to put under a setting hen. I want to gather whatever is laid and start them all at the same time with the hen. A hen lays eggs on consecutive days & they sit there without ruining before she starts to sit, so I figure I can gather the eggs I want and start them all at the same time to hatch. I've saved a couple of days' worth at room temperature (no refrigeration!!). So, how long can I put eggs aside before putting them under the hen? Thanks. Now, if I could just pick the eggs that are hen-only, no roosters!