These are my own eggs all collected same week as set date (last Sunday). Having said that, maybe I should have kept them somewhere more humid before starting incubation. Maybe I should just wait til Sunday check again. I could just play it by ear! Thanks for the thoughts/ideas fisherman s wife!
I am not an expert at all, but an air cell that large seems maybe that egg was not real fresh to start with? Did you candle when you put the eggs in originally or is this the first time? How many days are you at? If they are all growing large I think I would increase humidity to slow down the air cell growth. Perhaps this egg is more porous allowing more air in the egg, thus drying it too fast? Just my thoughts... Hopefully someone with more knowledge will chime in.