I have four hens all raised together and one, a production red, has stopped laying. She is not broody, in that she isn't spending any unusual time in the nest box or anywhere else. She acts completely fine. She still goes regularly to the nest box, sits for a normal amount of time, many times does the "egg song" and comes out - no egg???? No sign of shelless eggs. Can't figure it out. I know they slow down as they age, but since she was just 2 this spring and it went from regular laying to nothing in a week's time, it seems abnormal. Any ideas? At this point I am hoping a fall molt might put her system right again.