SO our next problem has been, fitting theses giant Aussie eggs into egg boxes, since we cant close the egg boxes we had before we got our Aussies,
so i almost avoid selling them & have been keeping them back & using them for our selves...HA
That is what I do. I don't send out the eggs smaller than 50g nor larger than about 70g. Have you weighed the big ones? My smaller BA has laid as large as 102g, the bigger one 114g - effectively a gram shy of 2 eggs the size of the low end of USDA large. Fortunately these huge ones are rare, I fear for the girls' health with the big ones. The smaller usually lays mid to high 60s, the larger high 60s to low 70s.
The signs usually go in order:
Combs and wattles get big and red
They start squatting for you--look it up!
They start "investigating" the nest box
Will sing the egg song as practice. When that happens, the first egg is usually within a day or two.
Except for my broody raised girls! NONE of them squat. But along with the red combs/wattles and nest box investigation, I did see them checking out the oyster shell feeder. Somehow they just KNOW!