We just got an incubator and want to try hatching some eggs. How quickly do I need to get the egg after it's laid and get it in the incubator? Can an egg that is cold still be hatched or do I need to get to it right away while it's still warm? Also, once I have eggs in my incubator, can I add additional eggs in there or should I only add them one "batch" at a time? Thanks!