And this is the evidence - Abby's first egg!
Whatever it was that Angus fed to Abby clearly did the trick!
You can just make out Fay's second egg.
We had to wait a long time before we got a good shot of Greta's fourth egg - but it was worth it!
A better shot of Fay's pair of eggs.
It looks as though Fay has started to roost in her nest box - a thing she has avoided so far.