I can't find the air sac

[Gossie]

I have a Silkie hen who is sitting on 4 eggs. I candled them yesterday (day 17). 3 of them had air sacs that look normal and 1 of them didn't have a visible air sac. It had an air sac last time I candled (day 14) What does this mean?

 

[Doctamomma]

Did you look on both ends it is possibly malpositioned

 

[AmyLynn2374]

I have a Silkie hen who is sitting on 4 eggs. I candled them yesterday (day 17). 3 of them had air sacs that look normal and 1 of them didn't have a visible air sac. It had an air sac last time I candled (day 14) What does this mean?

Are you candling down from the top (rounded end) into the egg. If you candle from the bottom or side, often you can't see the air cell.