I have a hen that stopped laying, she laid a couple soft shell eggs in the middle of the night while roosting. It's been awhile since she's laid or had a soft shell egg. A couple times I did notice her acting weird. Like walking with her tail feathers down, not eating. But then next day she's fine. I found a small soft shell egg with blood filled in it today. Again must of pushed it out while roosting. What does this mean? I feed a good quality feed, I have oyster shells available.