I have a fresh from the egg Belgian D'Uccle. It hatched maybe 2 days early. Shipped eggs and only 3/12 eggs even began to develop. The other 2 eggs have not even pipped yet. He unzipped on his own. Anyways, he is out walking around in the incubator still which is still at 37 degrees. There is a fan as it is not a still-air incubator. But I peeked in at him and his head is like...Vibrating? The beak is shaking left and right super fast. Almost like he is shivering/cold but its very toasty in there. He has only been out of the egg 8 hours so far, and its moist in there so he hasn't even begun to fluff yet. Here is a video, but it was VERY difficullt to capture just because of how fast his head was shaking haha. I'm sure he's prob fine and it will go away, but figure'd I'd ask just in case it could be serious and there is some intervention I should be doing. Thanks BYC!