Careful what egg you throw out, last night I was taking out four of eggs that did not hatch and remembered what a long time hatcher told me, She said, if the egg was fully developed and did no hatch shake it when you go to dispose of them and see if they peep, sure enough I shook one of the eggs on the way to the garbage after sitting outside the incubator for twenty minutes Peeped! I hurried and put him back in the hatcher and 4 hours later a happy little chick was up and going after nearly being sent to the garbage.....A Happy Chick....... It was day 23 for a silkie egg.