Three weeks ago we got a couple of ex-batts, and at the same time a couple of 12 week old silkies. Since then at least one of the ex-batts has laid us several nice big eggs.
This morning I found a very small egg in the nest box, less than half the size of the others. I think the silkies are too young to lay yet, so why has one of the big girls laid such a small egg?
Is this unusual?