weird sac

[chantelhatt]

I know this isnt a yolk sac or at least I dont think is. Does anybody have any idea what this is and what I should do with it?

 

[3riverschick]

Hi,
That looks like "water belly". As I remember it will kill the chick.
http://www.millerhatcheries.com/
Click on "More info"
Scroll down to "Broilers"
Click on: Ascites waterbelly in Meat chickens
Or it could be a yolk sac infection:
https://www.backyardchickens.com/a/mushy-chick-disease-yolk-sac-infection-omphalitis

Best,
Karen