That might be the problem. Celadons are rather fragile to begin with. My celadons produced about 80% celadon layers. The birds were healthy, but the eggs can still be fragile.
A video uploaded to Youtube and linked here would be good.
What are you feeding them?
Is this one eating and drinking normally?
What does its poop look like?
What is the brooder setup like? Does it have a warm end and a cool end? What are the temps at each end?