Poor little Alison! Don't give up yet, it can take a while for it to heal and stay in. When our Mathilda prolapsed, her vent was a mess, all cut up and hanging out and would get covered in poo. Several times a day I'd flush it clean with a squeeze bottle, spray some antibiotic spray on it (I used Bactine since that was all that was in the house), then smear some more PrepH on it to keep it moist, then gently push it back in. As awful as it looked for a long time, it eventually healed and you couldn't pick her out a backwards lineup after that. I've read that calcium is helpful and would give Mathilda a helping of plain yogurt every morning with her breakfast--if nothing else it was a treat she loved. Good luck and keep up the good work!!!