If you read the 'goose incubation' sticky on this site, the goose guy expert says if you hear peeping it means the gosling has already internally pipped and is breathing air. He make a very small 'safely hole' in the shell (candle first so you place the hole in the air cell). This makes it so the baby does not run out of air before externally pipping. I have done this a few times and it makes you feel a whole lot more secure about the gosling's chances of hatching. Do please read the sticky! Good luck!