Yep, they should still lay..... or so i'm led to believe.
I have 7 layers just now slightly older than yours & they don't lay every day.... 6/7 for the Calders & 4-5/7 for the Black Rocks.
I'm not sure if there's an explaination for that .
Have you wormed your birds this year or is it about time to reworm them ?
Have a look at their poo, you'll notice the worms if they're there.