Do chickens lay a certain amount of eggs in a lifetime and if they stop laying during the winter months, might they lay more eggs in their later years? If I give supplimental light in the darker months to keep the hens laying, will that shorten their egg-laying capabilities? I live in a city where I can only have 3 hens and we have them as pets - and I hope they will live a long time and continue to lay eggs throughout their lives - because when they stop laying (or the eggs become few and far between), I can't "refresh the flock" with more chickens because I'm limited to 3. If allowing them to not lay in the winter would prolong their laying abilities overall, I would gladly do it. If it makes no difference, then I will think about it.