x2, nothing to worry about. Almost every hen will lay one at some point in her life. I call em jello eggs. If she continues laying them then you can worry. But its totally normal.That's a soft shelled egg. They are laid before the shell is applied. Sometimes it's a system glitch, done often as hens are starting up or shutting down. Stress can cause them to be laid early, so can loud disturbances or any frightening occurrence can cause it as well as hot weather and any changes to the environment. They are nothing to be worried about and happen occasionally.