Pasty butt / feathers missing and belly swollen

[kelli joiner]

Hey I have a 8 week old barn yard mix frizzle, that overall is acting like nothing is wrong, I noticed that she had a pasty butt, so I brought her in and soaked it to clean it. I noticed that all her feathers below her vent are gone and her belly looks swollen as well as her vent. I check their vents once a week or so just to make sure that they are ok, I have 9 others and everyone one else is good. Last time I checked was about 5 days ago. I am out there regularly and usually sit in the run in the evenings for a little bit before putting them in the coop and everyone acts normal. They haven't started using their roosting bars yet. I didnt know if maybe she is laying at night in her poop.... I am worried I dont want anything to happen to her. She did poop several times and it was brown with white peak and once it was runny and yellowish.

 

[Skyewatcher]

I'm not sure, but here's a link to a search for soft belly
https://www.google.com/search?q=rea...d-att-us-revc&sourceid=chrome-mobile&ie=UTF-8

 

[kelli joiner]

Unfortanately, she passed away. She acted fine and was behaving normally when I let them out of the coop into the run. A couple of hours later I went to check on them and she had passed.

 

[LuciferRoo]

Sorry.