If her vent is still prolapsing, you might want to be careful about putting her outside with the rest of your flock. Sometimes other chickens will peck at a prolapse and that can be deadly. I had a bantam cochin with a prolapsed vent. It took about three months, but it finally resolved. Twice a day I washed her vent with some warm water, sprayed it with Vetericyn Hydrogel, then put hemorrhoid ointment on the area (reduces the swelling in the tissue). She even occasionally layed an egg inspite of the prolapse. She kept eating and drinking, but I did add electrolytes to her water and brewer's yeast as a supplement to her feed. After three months it was fine. That was in late January and she has been laying eggs ever since, with no prolapse or problems!
