Granted my winters are nothing like yours, for the most part where I live March and April can still be cold and snowy. It does not happen often but there has even been snow in early may. As far as egg laying is concerned, once the days start getting longer they start laying. My evil momma hen has taken a break from laying thankfully but she's also scoping out the nest area's. It never fails with her, weather be darned in February she's determined its time to start the year off right by going broody.Yep have a Roo, they will be 20 week by March first. But here that is winter stillbut days getting longer. Not that I am worried about them laying, I get on avg about 5 eggs a day I am awash in eggs hahaha.