Hi I need some advice. Mama sat on 2 eggs, yesterday was day 21 and one started piping. Mama seems scared and is just standing there. We put a heating pad underneath the eggs overnight as they were cold. Now 12 hours later the chick is still chirping, I felt movement in the egg when I went to check progress of hatching; no further cracking. I do not have an incubator and mom still doesn’t respond to the pipping egg. At what point do I intervene? And what do I do?