at this point if it were me I would open the big end of the egg....start small if you see blood stop wrap it in a warm damp paper towel...leaving the hole exposed...and put it back....if you don't see blood open it slowly so you can see if it's membrane has it trapped....you'll be able to tell if they're alive and you'll know...if there is no blood and it's alive help it hatch slowly! in case you come across blood...I'll be waiting to hear how it goes....if the dark ones are internally pipped opening a hole will help them breath....but try to see if they're trapped in the membrane