Thank you so much. Too late I already ate two. They were delicious! So I need to check the chicken up and measure the distance between the two pelvic bones? Oh they are not going to like that. Do you think it is likely to be the ones with the developed combs?
Yep.
I do exams off the roost at night, easier to catch then

Good thing to learn how to do, IMO.
Here's how:
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/
Might want to confine them to coop and run until they start using the coop nests regularly.
Free range birds sometimes need to be 'trained'(or re-trained) to lay in the coop nests, especially new layers. Leaving them locked in the coop for a week or so can help 'home' them to lay in the coop nests. Fake eggs/golf balls in the nests can help 'show' them were to lay. They can be confined to coop and maybe run 24/7 for a few days to a week, provided you have adequate space and ventilation, or confine them at least until mid to late afternoon. You help them create a new habit and they will usually stick with it. ..at least for a good while, then repeat as necessary.
I float test eggs I don’t know the age of.
Floating an egg will only tell you how old it might be.
They float due to evaporation when older.
It will not tell you if an egg is 'good' or 'bad'.
Plus then you've wetted the egg so it should be thoroughly washed and refrigerated.
When in doubt....
Open eggs one at a time in a separate dish before adding to pan or recipe,
use your eyes, nose, and common sense to decide if egg is OK to eat.