I have a broody hen on 4 eggs. Yesterday was day 20 and the first pip. By evening half the hard shell was gone and I could hear the chick peeping and see him moving. I thought for sure this morning he'd be out but only his legs are out. I've never had this happen before. Momma is sitting on them constantly and she does not like me looking under her. Will it be ok or do I need to help it out the rest of the way. It's peeping and moving good.