I have 13 eggs in a friends incubator and about 5 or 6 have started to pip. on day 29. They are one day late but is this ok? Cause i know that Guinea eggs are MUCH thicker than chicken eggs and the chicks can sometimes have trouble getting out. Do i need to be worried over anything or just let them be? And how long should i keep the eggs in the Incubator after hatch dates if some don't hatch? All help welcome. Thanks!