The other day I found one of my tiny bantam hens brooding on a nest she and the other birds like to sleep on at night. She got up for a minute and I found over a dozen eggs hidden deep down in the straw! I have no idea if any of the eggs are good since the birds sometimes slept on them at night and I don't know if that would have started them hatching then killed them when they got up in the morning. It had been only a day or two that the hen has been on the neat both day and night. What is the best way for me to check if the eggs are still good?