This is a 1st time for me. I had a chick pipping and it was able to zip all the way around but was still having problems getting out. I carefully pulled apart the shell and found this strange occurance. It had the vault like most of my silkies but there was no skull or even skin/down covering the bulging brain. Excuse the blood on the paper towel. It is only from the cord where the chick was attached to the shell yet. The yolk sac was absorbed so it was ready to hatch but just couldn't seem to get out. Normally I leave them in the incubator til they dry off. I knew this lil bugger wasn't going to make it so I pulled him out for pics. He did last about an hour and was sitting up and scooting around too. After viewing this.... it makes me wonder if some of those seriously vaulted skulls also have the brains bulging out like this, but just have the skin covering it. Its no wonder that they are so vulnerable to any tap on the head. With no actual skull, what's there to regulate pressure on the brain?