Day 19 just a few hours bevore day 20 startet. One ore two eggs always pip on day 19 most of the others on day 20.
As mentioned above. I always have one ore two eggs that pip early. Would not be concerned about that.
Hatch:
My chicks stay in the incubator for 48 hours to let them dry...
Only Info I found:
Of course, mix chicks can have any color variation at will (genetic inheritance). Which in turn means that the identification color of mixed chicks does not have to be correct.
I just keep them in my basement with the other eggs. I store all my eggs with the pointy side down (keeps them longer fresh). No turning (Saw a Video of someone who tried all different storing methodes and there was no differenc in Hatch-Rates)
Aircell: Although I am much more confident then when I startet to breed. One of the few things I am still doing, is to mark the aircell. With the bigger part put on the upside my hatiching rate went really up. I am not so confident to rember where all the aircells where ;-). To keep the chicks...
Day 7. Just candeld my eggs 2 non fertile out of 20 bantam eggs. And 2 olive layers and 1 dark brown egg are with a questionmark. They shell was to dark to see anything
@Lockdown/Candling: You have already got a few replies. But wanted to answer also: I take all the eggs out of the incubator. Candle them, mark the aircell and put them back in the incubator with the bigger part of the aircell up. And I do this without rush, as said the henn leaves her nest...