One of my hens is eggbound. I have bathed her in warm Epsom salts for 20 mins and tried massagimg her. I can feel the egg in her about an inch back but there is a layer of skin in-between it and my finger preventing it coming out. I have lubed with vaseline and when she strains it is starting to prolapse. The prolapse goes back in. Can I manipulate the egg past the skin?