You have to keep in mind that they had just started laying at the beginning of the winter. I suspect that a couple of them have only just now started laying, in fact. So I had twelve Wyandotte hens through the winter. For a while I was getting around seven eggs a day from them. Then it went down to twelve below for a couple of nights (they have been living in the open goat shelter, so no heated coop!) and the eggs dropped off to one or two a day for about three weeks, until around the middle of January when they picked back up. I suspect that with better housing, they would have kept plugging along at around seven eggs a day (average).
Now, what I've heard and read is that young hens who have just started laying usually *will* lay pretty well through their first winter, but that the following year (this coming fall) they'll probably molt and not lay as well during the winter. We'll see. I know my EE's stopped laying in late October and I didn't see any green eggs until about a month ago. They are almost two years old now.
Kathleen