I have two Ancona duck hens that I hatched this spring and I haven't gotten an egg yet. We live in MN, so it's quite cold right now and I haven't been extending light for them, so the days are pretty short (9 hours, about). I'm guessing it might be because I haven't given them extra light? Would the short days normally just slow them down, or since they hadn't started before the winter began, will they not lay at all until spring? Thanks!