About ten days ago i noticed that one of my hens had a bulge between her legs, and I thought that she just needed to lay an egg. I noticed it again two days later and I thought the same thing. Again, two days later and this time I though Wow! I guess she's a prolific layer. ( I know, I was being a little slow!) Well today the bulge had gotten significantly larger. I felt it and it doesn't seem to be an egg, it's very soft and mushy. HELP!!!! What's wrong with my hen?