I have a hen that today when I was checking for eggs stood up and had a red, bulbous portrusion from her vent. I let her be, and came in to research. It looked like pictures of a prolapsed vent. So I isolated her and watched her a while. She was squating in a nest in her isolation crate, but nothing. So I soaked her in warm water with epsom salts and checked her vent...no portrusion. I went ahead and lubed her vent up with petroleum jelly and sprayed some vetericyn on it just in case, and put her back in her crate. Went later to check her and she had knocked over the water, so I picked her up to clean up the water and get her fresh straw, and out came the red portrusion. It goes back in on its own...but I am not sure what to do for her. She is healthy, she free-ranges each day from 1 to 6 hours, has access to oyster shell and egg shell freely and is only 2 years old. What am I dealing with here?