TJAnonymous
Enabler
Are you able to take a picture? It's hard to say without being any to see it.
Did you mark the air cells before setting them in the incubator? Is it possible that they were slightly older to begin with and the air cells were already larger before setting them?
Saddle shaped isn't a science, lol, descriptions are to help to identify exactly what weirdness is happening with our shipped eggs. Saddled air cells, jiggly air cells, and detached air cells are all slightly different looking but they're all basically from the same thing, trauma from rough handling causes the membrane to separate from the shell. The air cell might not be quite as big as it seems if the membrane is detached the light when candling with still illuminate the area even if the membrane is just below the surface...I'm sorry, that kind of hard to describe.
I did not mark the air cell before setting them. I did briefly candle them when I set them but they were dark and hard to see through. I let them sit for about 36-48 hours after they arrived before I put them in the incubator.
Here's a few pictures. The white eggs are from my Blue Andalusians who are very young pullets so their eggs are still on the small side.