Well their not really 'just being hens' - that would be being broody and hatching them after there were a certain number in a nest.Well I just finished my home made solution. As you can see it’s not perfect but I’m not going to cull the hens. They’re just being hens so I’m trying to outsmart them.
Eating their potential offspring before they hatch is a terrible habit, that once they learn can be detrimental and catchy, because as we know hens aren't stupid - they learn by watching other birds in their group.
A roll away box is your solution, it's a good one! Separating the culprits from the flock is another, after assuring nutrition is sufficient and culling is not a personal option.