I'm on day 21 and they are hatching, but the one that was the first to poke through the inner membrane a couple days ago hadn't hatched, so I candled them all tonight and many of them looked like they stopped developing. can a styrofoam carton suffocate them? also, the second chick to hatch has a huge craw like maybe it swallowed a lot of fluid. I had been worried that the humidity was too low(30%) the whole time, but now it looks like it had been too high... weird. This is my second hatching experience, so if I'm right or wrong here let me know.