Someone in our flock of (15) Cuckoo Marans hens (all 28 weeks old, been laying ~8 weeks) is laying incredibly large eggs. Should we be worried?? Is there any way to discourage it? The first was 136g (Tuesday), then 140g (Friday) and today 147g (Monday). At this rate I am afraid they will keep getting bigger... After the first two (136g & 140g) we checked all of the hen's vents, and they all seemed fine. We cracked the 136g and it was an egg within an egg.