This happened about 20 minutes ago. I don't know how to put this nicely so bear with me. One of my chickens was taking a ****, but what caught my attention was that after it came out (it was much bigger than usual, but still normal) she didn't move or change the pooping position. She was stunned, like she's seen a ghost. I thought she was going to lay an egg. When I checked closely it looked like her vent was turned inside out. It was like a fleshy walnut. It wasn't hanging out and it didn't have any wrinkles on it. I looked for vent diseases on the internet but nothing looks like her case. When I reached to grab her she ran away and the vent turned back to normal. She's prefectly fine now. I hope this was just a little accident caused by the monster poop, but I want your opinions. Better safe than sorry.