Air sack

[GoodCheerJoy]

I have 3 Sebastopol gosling eggs. One has internally pipped and is chirping happily trying to break free. One has a small air sack, the air sack hasn't really changed in about 2 weeks. It's about 1/5 of the size of the one doing well. I see movement in the egg. The third one, well it has a somewhat larger air sack and it is trying to do something but it is way behind it's sibling. Just wondering if anyone has had goslings with tiny air sacks make it in the end?

 

[Miss Lydia]

@Pyxis

 

[FoodFreedomNow]

It's strange that the air cell didn't grow similarly to the others, but I've seen variations among goose eggs incubated under the same conditions (though less dramatic than what you describe). The primary risk with a smaller than optimal air cell is that it won't be sufficient to provide enough air to sustain the gosling before it externally pips. If moisture loss wasn't adequate, it's also possible that the gosling may be very large and have trouble hatching on its own.

With an abnormally small air cell, it'll be important to know when the gosling pips internally - I would carefully put in a safety hole as soon as I saw an internal pip to ensure that the gosling doesn't run out of air before it can externally pip. I strongly recommend thoroughly reading Pyxis's article on assisted hatching before attempting an assist.

Best of luck with your hatch!

 

[Isadora]

It would probably be helpful to anyone who wants to give you advice if you could post it picture of you candling the egg in question.

 

[Miss Lydia]

This may help too
https://www.backyardchickens.com/threads/goose-incubation-hatching-guide-completed.491013/