The last few times the goo stayed in the egg and another chick was close to hatching so i stayed up to see how it was getting out٫ once the chick was out their was a cord connected to the belly and it pretty much thrashed around till it ripped off. Im so confused![]()
Occasionally the cord does that, it's not entirely too uncommon. If you see the chick dragging the shell by the cord you can pinch it with tweezers and snip it. Most of the time it comes lose on it's own. It sounds like your temps may have been a bit high or your humidity for the first 18 days a little too high. I would need to see more pictures but usually when you see a navel prematurely closed with a hernia it's because temps are high. Did you use a secondary calibrated thermometer/hygrometer during incubation or just the one on the incubator? What type of incubator are you using and what were your settings throughout incubation?
I suspect the incubator might be one fo the yellow top China-bators and they have a tendency to fluctuate in temps quite a lot. They aren't the most reliable incubators unfortunately. There are things that can be done to try to keep the temps more stable, such as using the styrofoam that comes in the shipping box as an insulator but if that's what you're using it's not due to anything you did wrong with the hatch that would have caused this. It's the incubator itself and the unstable fluctuations.