I know this is a not a duck site but my son in law is hatching Ruein ducks. At day 24 the beak is in the air sack and peeping. Is this unusual for an egg to hatch this early? If so can chicken eggs hatch 2-3 days early. I know he is not prepaired for this early hatch. I told him to get his butt in gear and get ready. I don't have an answer so I though I would ask here. Please advise. John