Im curious: has anyone hatched eggs after day18 with a heat lamp?? Since they need to be still I thought it might be possible to put them in a rubber mate with a heat lamp over it at the right temperature and to keep the humidity up with a wet rag and try hatching that way??
Anythings worth a try here in texas where it stays above 90 for the low we had an egg hatch a week after the hen quit settin on it. Its not inpossible for an egg to incubate its self giving the right temp.