We didn't had much snow in the last few years, only cold and strong cold winds, this year also a lot of rain. But as soon the chickens have a dry area (necessary also if it rains frequently) they should be fine. If it snows a lot and the snow remains for a long time, I'd build a covered run (or at least a partially) where the chickens can hang along and choose if stay in the snow or in the drier part.One question, are feathered feet ok in a snowy area? (Asking because of the Brahma & Cochin)