Start with whatever you used to puncture the air cell, and carefully begin removing little bits. It should be clear right away if your egg is still alive.ok thanks, what should i use to chip away the shell?
Here is a recent hatch of mine. I had just removed the entire air cell about 24 hours after putting the safety hole in. You can see the duckling has pipped, and at this point, was still chewing away. The veins in the membrane are still a bit red. I made sure the membrane was moist, then this little guy went back in the bator.