What you need to do,...is WAIT, and then wait some more, and about the time you are firmly convinced that these chickens will NEVER lay eggs, well then you get the prize. We have all been there!
Watch them, when their combs get bright red and almost look swollen - 3-4 weeks from then. If they squat for you, about 2 weeks.
With chickens you do a lot of waiting to see what happens:
- are the chicks roosters or pullets?
- when are they going to lay?
- when are they going to hatch?
Repeat - but they are a fun hobby. I currently figuring out who is a rooster with one bunch about 6 weeks old and Tuesday should be hatching....
Mrs K