Late to the laying game?

[Slauterbach]

I know these breeds are “late layers” but some of my chickens have fully developed combs and waddles that are bright red, and still are not laying.
Our girls are 23 weeks and are the following breeds: Light Brahma, Black Austrolorp, Barred Rock, Easter Egger, and Cuckoo Muran.
We have put dummy eggs in their nesting boxes, checked all around (as they are free range), and left them in the coop for a few days even just in case and still nothing.
I read online that unhealthy chickens will not lay.. while our girls look heathy I took some extra measures in giving them some extra products to increase their health.
They are kind of all at varied development but we have a good group that have fully developed combs and waddles.
At what week should I expect them to lay? Are there signs I should be looking for?

 

[darkbaysfordays]

I think it's a waiting game, genetics, nutrition, and luck of the draw. Myself and three of my friends all got chickens this year between late March-April. I am still the only one who hasn't had any eggs yet. My SLW and JG's will be 20 weeks old and my EE's will be 18 weeks old this week. My friend who got Australorps and Orpingtons the same week as I got my older girls, is getting eggs. She also got SLW from the same batch and mine look more developed than hers.

 

[ChickenCanoe]

If you are in the northern hemisphere it could be soon or delayed for months due to the fact that day length is decreasing. The farther north you are, the faster day length is decreasing.
Combs and wattles that are larger and darker is one indication but for a more scientific way to tell if laying is imminent, check the distance between the pointy pelvic bones.
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/

 

[aart]

check the distance between the pointy pelvic bones.
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/

Yes...and if their pelvic bones are spread and vent is moist might want to confine them for longer....
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.