Chicken eggs take 21 days to hatch, and quail eggs take 17 days to hatch so it's important to know the exact day you put them in the incubator. I maintain the temp. 37.6 C and humidity 60 % and increase it to 65% at hatching time for fully emerge from its shell.
If some of the chicks haven't concluded their hatching after twelve hours, go ahead and remove the tops of those eggs.
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