So these are my 2 eggs (started w/ 7, won't go into the details, have them in this carton 1st time b/c I have other eggs due next wk that I want to protect from rolling eggs). I've hear chirping since last night, soft, not too steady. Someone suggested they could have pipped on the underside & if so it was important to flip them over. What do y'all think? What about the "opening the bator" thing? Can they still zip if they pip the underside? I never worried about this when I just laid them on wire mesh. Thanks!!