Have 43 eggs & today is day 17. But there are 10-15 eggs that have been advanced from the moment they were placed into incubation. They traveled from Tennessee to Florida, in the heat. I am unable to get a good photo to show what I am talking about so hopefully this explanation will do it. The air sac has began to sink in ... like the letter U. I can not see veins, movement or anything. Just too full, too dark, inside the egg. The other eggs NEED to be in the incubator until lock down tomorrow morning. They look normal when candling. Can see movement, veins and although full, it is not like the other ones. Should I place the advanced into another incubator & start lock down early or let it be as is ???? UPDATE: Found this video. The air sac kind of looks like this but everything is completely dark.