Since early this morning I watched this one chick pip and do nothing. This evening as went up to check on my chicks and look in at the temps on the bators The pips had not progressed very far. I leaned over the bator and started whistling. The chicks started peeping and zipping. I kept whistling. Never stopped whistling. 4 min 38 seconds later a new black orpington birthed itself into this world at 7:32 pm. It doesn't get much better than this on hatch day.