I really think it depends upon the willpower of the chick, whether they survive or not. I've done a completely sanitary assisted hatch with an incubator silkie chick, going slow, proper equipment, etc, with minimal amount of bleeding, and the chick just died shortly after being hatched out. On the flip side, I've had a broody leave an egg after it pipped and it stayed out from under the hen for almost two days. I finally decided to help it, though I was pressed for time (it was still peeping and alive), hatched it out right there in the nest with my bare hands, actually severed the main 'umbilical cord', which bled a LOT, the chick's yolk sack was only just sucked in, and the whole umbilical area was still loose and open. I wiped around the umbilical area with a wet paper towel to clean it up, stuck it under a heat lamp to dry it off, gave it some hummingbird sugar water, and that evening I put it back out with the broody. It's about 4 weeks old now, and still strong and healthy. He certainly had the will to survive! He/she is a olive egger project. I pray your chick is as strong and has an incredible will to live, as my miracle baby did!