Hi. I am not an expert at that, but I see that no one has replied to you yet, and you are probably feeling helpless. Maybe this will help you out: There is a thread, maybe more than one, about opening an egg artificially. At this point, there is probably not much to lose, but be prepared for a chick that may not survive. I think the basic method is to take off the top of the air cell carefully, then apply a thin film of oil to the membrane so you can see what's going on better. Then proceed to let in some air. The veins need to be no longer active or there will be a fatal bleed. The video that's up right now on the thread about the double yolk twin (check this site home page weekly topic) shows a woman artificially opening an egg. Search assisted hatching and you will find people here who are very experienced with this. Often late hatching chicks have perosis or some other leg issue keeping them from turning and getting out on their own. Chicks like that often do not survive or have to be put down within a few days for mercy's sake. If you can't find the information you need, I'd try starting a new thread with a big SOS to get others interested in your situation. I hope it will all work out for you.