My first time hatching eggs and of course my incubator broke.. so my friend was continuing to hatch my eggs for me. While we were waiting for them to hatch she decided to leave them in a little longer to make sure all of the eggs would hav time to hatch 5 days prior to her leaving them in a little longer we had one egg crack like a check was trying to break out we kept an eye on it but there was no progress made and there were no sounds or anything coming from the egg so she presumed it was dead. 6 days later we're cleaning out the incubator and we pick up the egg that have the crack in it to toss it out and it's makes a peep! I have never helped a chick check out of its shell..i decided to slowly start peeling parts of the shell off and then slowly peeling parts of the membrane back on the inside of the shell.. there are several send spiders like veins still with quite a bit of blood and i was in fear i could be hurtting the chick.. I kept going slowly peeling everything off of him so finally he had one big wiggle and fell out into my friend's hands he was fully developed but had a stringy like cord thing around his neck that we couldn't find attached to anything but itself I gently clipped this off with a pair of sterile grooming scissors ( I was a groomer and him worked in vets offices before as kennel Tech) and we put him back in the incubator to warm up. Is there anything else I should do or should I not have helped at all I would just like to know what I need to do the next time if this were to happen again?