Do I start my 21 day countdown on the laid date or the first day in incubator? I'm on day 21 based on the shipped date. They are on lockdown but no pips, chirps or noticable rocking. I know it's early but I'm new to hatching and worried. 11 out of 15 have developed. But trying not to count my chickens before they hatch has prove very difficult. :{