Help what is going on with my chicken

[Karolinp]

Few months ago one of my chickens started being in a weird position and below its cloaca it started to swell up a lot ( look at the pictures). Also her poop gets stuck in her feathers.
Everything else is fine, she is moving around with the other chickens and eating and drinking.

 

[MysteryChicken]

@azygous

 

[azygous]

Swelling below the vent can indicated a reproductive infection or it could just be fat. Unless this hen is exhibiting signs of feeling ill, I wouldn't worry too much. The poop could tell us something, however, and it might be a good idea to post a picture here so we can take a look at it.