My 10 Runner eggs are supposed to hatch on the 12th. They seem to be developing well....nice air space.....movement, etc. However, I noticed a couple of them pushing into to the airspace today. I can tell that they are still in the membrane, because it looks like they are kicking under a blanket. It has made me a little nervous. Is this normal? Are they getting ready to pip. And if so, are we close enough to the due date that they will likely be ok?