Hi, My guinea hens/cocks are 6 months old and laying pretty regular. They are in a hen house and keep burying their eggs in straw/dirt (it's no warmer than 30 degrees F)--now that I'm home, I went in and collected only 5 of the eggs and they are in the incubator. I think they might be laying on a whole pile of them though buried. How many days can I go back and dig up to hatch myself? Thanks for your help!