I have a Cochin hen how has been brooding her eggs. I counted out 21 days since she "disappeared" and it has been 2 days past the 21 day mark. I candled a few and some seemed really dark with the air pocket... I dont know if they are alive or dead or if i miss counted the days. I honestly dont know what Im looking for when I candle an egg even tho I have googled it to the end of the universe and back. Im so scared I'm going to murder the babies inside when I handle them and take them away from the warm mommy. Should I let her brood for a little longer? If so how much longer? Should I just go buy some chicks if they dont hatch for her so she will stop?