Bulging red anus, what do I do?

[EricJayfarmer]

I was feeding and giving water to our ladies this morning and I noticed our Rhode Island Red had a bulging anus. She squeaks every time she pushes, but can't push it out. here are some pics. Any idea what it is? We also saw her throw up some water which was slimy.

 

[Miss Lydia]

Quote:
Looks like a prolaspe here is some information about it, keep her separate from the rest of the flock or they will peck her even to death, chickens are drawn to the color red. https://www.backyardchickens.com/forum/viewtopic.php?id=529050 and

 

[fishnet1971]

can that happen with a roo as well?