I know mine slowed down this winter but I still get almost 6 a day. Sometimes they go a day or two without laying, or they give me three eggs (out of 12 chickens). Maybe something is coming by to visit and it's stressing them out? Maybe they're hiding them in the snow? Maybe they're just as angry as us with this super cold weather! With all the snow we've had its great to see what's been walking by your coop! Hopefully they pick back up again I hate buying eggs!