Today Snow settled in a nest box. She had taken just under a two week break since she went broody.

Next time I checked Snow was back out in the run and her egg was in the nest box. I was so pleased to find that it was perfectly smooth and normal looking. No wobble in the shell at all.

It seems that Snow really is back to normal. Whatever had happened to her laying seems to have fixed itself.
Both Red and Storm have now come through their broody spell and we now have four girls laying, Gold, Cloud, Mango and Snow. Hurrah!