How do I know if my duck has a swollen abdomen or something like water belly??

[Drowsy_808]

It’s my first time raising ducks so I’m very inexperienced. I don’t have much knowledge regarding ducks either, so there’s a lot I’m unaware of.
How do I know if my duck’s abdomen is swollen or not? Can’t it just be fat?? How do you know whether or not it’s because of the egg??? How fat should her abdomen be for her to be healthy?? So many questions. I’d appreciate some help, even a bit would be much appreciated. Thank you!

 

[DotToDot]

Are feathers missing? Is it pushing her legs apart? Can you post pictures?

 

[Drowsy_808]

Are feathers missing? Is it pushing her legs apart? Can you post pictures?

No, no feathers are missing. It isn’t. Unfortunately, I can’t now, but I can later