Its up to you. I usually like to candle day 6, 12, and 18 (start of lockdown). With my first few incubations I liked to candle nearly every day lol but now I am more of a set it and forget it hatcher.
I dry incubate, as well![]()
Somehow, I have it in my head not to candle from day 10-14 - something about eye development? I'll have to go back and research. I usually do 7 (fertility check), 14 and just before lockdown.