Judging by the piece of eggshell at the bottom of the picture, Olive's eggs have started hatching.
Olive has another piece of shell in her beak. Sometimes the hen eats the eggshell, and sometimes she takes it out of the nest. Producing a large clutch of eggs must make significant demands on her calcium rquirements.
Now that Olive is off the nest you can see that so far four eggs have hatched.
Here is Owen with food for Mum and her chicks.
It's now 11:05am and it looks as there are only three eggs that haven't hatched.
Two hours later there are only two unhatched eggs.
It is now shortly before 7pm when the system turns off for the night. It looks as though there is still one unhatched egg.