I would agree, you will get opinions that are all over the place. I also am of the class that says don't help ever. There are reasons a chick is not able to hatch and you do not want to pass that on to future generations. I do make exceptions for those that only plan on getting eggs, want a pet or whatever. As long as the chick is never used to breed. and that does not mean "well I didn't mean to end up breeding it but it was just so cute, so pretty or whatever. Never allow the deficiency that prevented it from hatching on it's own to be passed on. As for what you describe. I don't think you have anything to worry about. It sort of reads a little like, Help is my chick in trouble it is hatching and everything but I don't know if it needs help? The last egg I had hatch pipped at 1;30 in the afternoon, took a couple of hours to make a couple more cracks in the shell and then nothing for 10 hours or so. not a thing except a rock once in a while. then in one hour to the minute it zipped and was just fine at 12;30 in the morning. and I consider that really fast hatching. IT can take up to 2 days in some cases. Your chick is now breathing in to ways. one with it's lungs and partially by all the network of veins inside the shell of the egg. the veins are slowly shutting down and the lungs are taking on more of the work of breathing. this balance needs to work itself out. veins shut down causing the chick to breath more of that cooped up Co2 laden air which causes spasms that break the shell. shell breaks giving more air, spasms stop, more veins shut down. and the cycle continues. The spasms are also what causes the Egg yolk to fully draw int o the body and also strengthen the legs of the chick. It is far far better that your chick does this on their own that to have you help it.