So I have two chicken eggs at 16 days. What should I expect on hatch day? I've never done this before. His long does if take? How will I know if it's going okay or wrong? Do I hover over them or just go about my day? Also, we are nearing day 17 and there is still a lot if light colored space at the bottom when I candle. Are they behind? If they develop slowly, can they still be okay? How many days out can they hatch?