I recently (last month) had a chick pip at the wrong end. When I candled it, it looked like the air cell was extended in a peninsula-like way to allow it to internally pip, and I did see an internal pip. It externally pipped a few hours later, then the pip got a little bigger about 12 hours after external pip. I woke up to it trying to zip (it had been at least 24 hours since external pip), but it got stuck and stopped zipping, so after an hour of no progress, I assisted out of the egg. Once they start to zip, their yolk sac is absorbed and they are ready to hatch. Fortunately, she is a pullet, so it was really worth it!
I would wet the membrane with some water to see if there is any veining still. You could also remove some of the shell that is already broken to get a better view.
I would wet the membrane with some water to see if there is any veining still. You could also remove some of the shell that is already broken to get a better view.
