It is good the prolapse has stayed in. Can you try reintroducing her today inside a wire dog crate with food, water, and bedding or pads? You can do some supervised visits today to see if there is any bullying. If that works out, and she goes off to do normal exploring with no one picking on...
Can you post a picture of the prolapse? I would give a dose of the calcium today. Sometimes if the others see the red prolapse tissue, they will peck at it and injure the vent causing bleeding and possible damage. Keep the prolapse tissue from ever dripping out with honey, sugar paste, a cream...