I have three hens, including a Buff Orpington I am counting on to go broody. I thought I could just stop collecting eggs until there were enough to trigger her desire to sit on them, but I now doubt whether this is the right way. How long can the eggs remain viable without being sat on? I'm in the metro NY area where the nights are still dipping to frost temperatures. How do I go about this? I'm in a bit of a hurry because my rooster's days are numbered around here!