I have 3 turkey eggs that are in lockdown right now. 2 are pipped and one started to zip a little. It has been a while since they pipped and I was checking on them through the clear sides of the incubator when I noticed yellow foam bubbling out of the one that started to zip. Panicked, I took the egg out of the incubator and tried dabbing it gently with a paper towel to soak up the foam. The chick was cheeping at me and wriggling, but it also looked like it was gasping a little. I dabbed the paper towel around the nostrils to make sure there wasn't any in them and drained a bunch of the strange liquid out as I could. I have never seen this on a hatching egg before. Earlier today I noticed that the humidity was too low and the membranes were starting to dry, so I slightly mist the eggs to make sure they could be remoistened. WHAT HAPPENED?