I'm not sure when it pipped but the other one was fluffy and completly dry so I assumed it had been awhile and I was also not sure it was alive anymore and I was stressed so I opened it a tiny bit and took off the loose shell bits from the pip. and then the hen it was under rolled it all around and it was on its face a few times and there is rotten eggs all over the nest. I have had chicks just like this that start to zip and suffocate because they can't pip and die so I really don't want that to happen to this one. It didn't seem to be able to zip it was poking at the shell and nothing was happening. Maybe I shouldn't have taken it away from the hen I just couldn't bear the thought of seeing this alive chick and having it die because it suffocated when I could have done something. I'm sorry, I probably intervened to soon.