About a month ago, we started finding that we were often getting shell-less eggs laid in the coop at nighttime. Since four of my hens had just begun laying, I thought that it was just a little pullet mess-up and it would be back to normal soon. However, I have had many, many shell-less eggs by now (at least 10). There were multiple times when all four of the pullets laid a normal egg in the nest box after one of the hens laid a shell-less egg the night before, and there was once or twice when there was only one hen who didn't lay an egg after a rubber egg incident. This leads me to think that the one laying rubber eggs is our white leghorn Cloud, one of our three 1 year old hens. She's always been a little weird. Her poop has always been watery (except for cecal poops) and she didn't start laying until she was 8 months old. I'm worried she has egg yolk perontitis or something similar. Any opinions?