The day you set is day 0Day 16, 9, and 4
How good of a chance does a chick have of hatching if the air sac is attached to the side of the egg instead of the top?
Also, I've been thinking about how I count the days. is the day you put the eggs in day 1 or day 0? The way I've been counting is by the end of the day not the start of the day.