My first pullet egg! Just who layed it...

[aart]

I’ve found the only way to be absolutely sure who laid what is to become a peeping Tom nest box lurker and watch to see what comes out of which chicken

Yep.

As far as catching them, can you grab them off the roost at night to do a pelvic check?

That's the only way, IMO, I don't chase chickens

In case you don't know how to check pelvic points, here's some tips:
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/

 

[HuffleClaw]

Can we also see pictures of your pullets