Probably find they didn't sit properly on them if they are peeping can you her it without putting it to your ear if yes then I would say they have internally pipped
Just leave them to it
Keep me posted you can message me if u want:frow
are you sure she was sat on them for 30 days?
thats a long time and does not sound right if there was still a lot of yolk left they can be layed 30days ago but it goes on how long they have been sat on them for.
maybe it just seems like that long ago:
the air sac will get smaller as they develop