One of my 2 year old chickens had poop on her butt and was moving slowly, and closing her eyes so we cleaned off her butt and she seemed fine. A few days later her butt was covered again. So we soaked her in a bin of water and soap and while washing her off there was a big white ball and when I pulled on it the white part came off but there was like a "string" attached and coming from her butt and on the end of the "string" thing it looked like a deflated chicken heart. I ran to the house to get my phone to take a picture and when I got back it went back inside of her. Does anyone have any idea what that was??? When trying to find information Prolapsed Vent kept coming up but it did not look anything like that .