I have three hens all around 5 months old. One of my hens (I assume it is Terry) has been laying for about a week and a half now, I have recovered 8 eggs. My other hens have not laid a single egg. Is this maybe because different ducks lay at different times? The hen that is laying is much bigger and matured and feathered about two weeks faster than these hens also. Any insights you have would be helpful.