When can I expect eggs, and are they really black sex-links??

[aart]

They are gorgeous!

Given that, when do they usually start laying?

18-28 weeks for most breeds.

They have become very vocal lately, if that means anything!

Yep, it does.

Here's some tips on how to tell...
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/

 

[scott6150]

I have barred rocks that are 21 1/2 weeks and no eggs yet. They don't have full combs and wattles yet. Should I be concerned? They don't squat for me yet.

 

[aart]

I have barred rocks that are 21 1/2 weeks and no eggs yet. They don't have full combs and wattles yet. Should I be concerned? They don't squat for me yet.

18-28 weeks for most breeds.