A few of them had not internally pipped and were not going to be able to, the membrane was shrink wrapped over then, Their beaks were right under the membrane though so I just made a little opening. One started gasping for air, poor thing. I know assisting is controversial, but I just figure there is really nothing natural about incubating in a box, so I feel it is making up for human error. With eggs from my own birds, I can experiment till I get just the right conditions for them to hatch on their own.