I have heard a lot about the cardboard egg carton method used during the hatching process for the call ducks, which makes a lot of sense. But, some have suggested cutting a small hole out of the bottom where the egg sits to provide more oxygen to the egg. Then, I have also spoke to those that left it alone and did not create a hole. So, any suggestions would be great. I have one that is getting close to hatch and she/he is really special to us and want to have the best hatch experience!!