Some do wiggle, some don't, depending on how the chick is moving.
We last month had a broody give up on some of the eggs she was sitting on after the others hatched (she must have been stealing eggs causing a staggered hatch because there were way more than we remembered setting her up with, lol)
So she kicked eggs aside and we gathered them for disposal. About 4 hours later I was busy tending the little Sussex chicks in the brooder (we had to remove mom), and over a chorus of their cheeping I kept thinking I heard a smaller cheep.
I was looking all around thinking one must have gotten out. Finally my ears led me to the disposal bucket. One had pipped! She was complaining her head off in there!
So since we didn't have an incubator at hand I remembered old BYC conversations that humans are about the right temperature and one woman had put eggs in her bra during a power outage.
Forgoing the bra, I chose to hold the egg in my hands for the rest of that afternoon while she slowly hatched. When she intermittently complained too much without making progress, I cheeped encouragement at her and she would try harder. She hatched in my hands, it was a beautiful moment. I named her April after a Fairy Dragon in a book I read who complained a lot, she was hatched in the month of April and so was my little April. I can still identify her in the brooder by the tone of her complaints, she manages to sound extremely put out.
So umm, I think what I'm saying is Yeah, they definitely cheep a lot while hatching. They seem to encourage one another and hatch in groups because of it. In the past I've had lone hatchers seem to give up in the quiet after siblings were removed to the brooder. I felt like cheeping back at them really helped
