ok I Will wait, someone on the other thread said 15-18, but if there’s no worries I would prefer waiting I don’t want to mess anything up. The only thing that worries me is it almost looks like a tiny crack I’m not sure if it’s actually open or air is getting in. I will try to take a picture when I get home.If today is day 21 and they're just starting to externally pip I would wait before you start worrying. They can take up to 24 hours to hatch after external pip.