Hi! What could cause a fresh egg (laid 15th, set 18th) to have an aircell full of bubbles? I didn't candle this group prior to setting (I usually do), so not sure if the egg was like this before I set it. Needed to swap incubators this morning so I went ahead and candled eggs set the 18th. Found just the one with the weird bubbly air cell --- and it's not developing. Any ideas? Thanks! Lisa edited to add: egg, fresh egg.