My duck eggs all internally pipped at about the same time, early morning of the 30th of June. By late morning of the 1st of July, all but one had externally piped. I was worried that the one egg would suffocate, being +/- 30 hours since internal pip, so I manually added a small breathing hole. The chick is sounding lively since then, but still has not externally piped. Is it normal for a egg to not externally pip if you manually add a breathing hole? I’m not too worried, as none of the eggs have started zipping yet, and the egg with the breathing hole is sounding strong, but I’m just wondering wether it should have externally piped?
Looking forward to hearing!