Nervous about BCM eggs in the incubator

[chocolateeggs]

I recently (locally) purchased some BCM hatching eggs from a novice chicken farmer. He kept his hatching eggs small side up instead of down and I didn't notice this mistake until I was home... I am guessing they were like that close to a week, possibly a little longer. Will they still be fertile or will the air sac be too compromised?

 

[sumi]

You'll have to candle the eggs and see where they air sac is. It is possible to hatch eggs with compromised air sacs, though it's tricky. Have a look through this article, there are some links to managing damaged airs acs:

https://www.backyardchickens.com/a/hatching-eggs-101