I've had to assist. As long as you go slowly, keep everything moist, and wait for the veins to recede, they be fine. Personally, I'd open the hole a bit more so you know they are getting oxygen. And watch the beaks. If they turn in the shell and don't break through soon, they suffocate. Lost a few to that. Maybe I mess with mine too much, but I only lost ones from waiting, not from helping. I just am worried you'll be disappointed in the morning.