I have noticed that some of the air cells in my eggs are huge The air cell is around the top and up the side. on about 6 eggs out of 26. The rest are all about the same size. Is something wrong? They have been in the bator for 10 days. My Humidity is running about 50% Oh, I also have Japs in there, for 14 days, that have not lost any weight in the last week, they lost 7% the first week. Any advice would be great. I did not weigh the batch of 26 when I started them.