If it is not their first winter, I would like to know what breed they are We getting only 50% of our eggs right now, from leghorns that are approaching 2 year old mark. They laid non stop through their first winter.
They are only egg laying machines when they are kept like egg laying machines (caged, on formulated feed, under artificial lighting, optimal temperature, laying for no more than a year). Also don't rely on eggs/week breed data - chickens can take lengthy winter breaks or go broody - you will...