I have 5 hens--different breeds -- 16 weeks old. Some have very red face/combs but not squatting yet. Since it is coming on winter (in Georgia) and now pretty cold and dark earlier, can I expect a first egg sometime in the next couple months or is it likely to be in the spring? No artificial light in the coop, but considering that....... Also, they just finished the last of the grower feed and I bought some layer pellets. Should I keep them on the grower for a while longer or is it ok to start them on the layer--at 16 weeks?