I have a 25 week Barred Rock who has been laying about a month now. She usually lays late in the afternoon and they are beautiful brown eggs with a hard shell. (Her 1st two eggs had no shell.) For 5 days now she has been laying shelless eggs. The membrane is intact but no shell at all. They look and feel like water balloons. Funny thing is... they are laid outside the nesting box???? She has been on layer pellets for 6 weeks or so and has access to calcium chips. Today she may have had her feathers puffed up a bit but otherwise acting quite normal. Any idea why this would happen all of the sudden?