Last year I had a 9 month old BC Marans who suffered a prolapse. I took her to an avian vet who collapsed and removed a stuck egg and put her innards back inside. He kept her for observation and she got another stuck egg. He did the same again but she wouldn't come good and after nearly two weeks she had to be euthanised. Oh well. Last thing yesterday night I saw that one of my old white Leghorns had also suffered a prolapse. It looked much worse than the first one I saw. There was a lot of blood and she looked really miserable, all puffed up and lethargic. Seeing as the best avian vet I could find didn't have any luck fixing the first one, I thought it was kindest to just put her out of her misery, and so I euthanised her myself. Now I'm wondering if two hens suffering prolapses in six months is something I should be worried about? They were different breeds, different ages, and came from different places. So the only thing they had in common was ME. Was it something I did? Something I didn't do that I should have? All my birds are fed layers pellets ad lib, they free range all day, and they get a small amount of corn each morning. I get the very occasional soft shelled and/or weird shaped egg, but apart from that everything seems normal. So what exactly causes prolapse and is there anything I can do to prevent it happening again?