with my girls the first ones to lay had the smallest combs and wattles that were very light pink in color. it took my by surprise because i thought i would get eggs first from the girls who were a lot more developed but they started last.
I went to get some pullets from this guy once. I was trying my best to catch the most mature looking pullets.
The man said "I think I know what you are doing and it might actually backfire on you." He said all the pullets were 16 weeks.
We did a little experiment and got half mature looking and half not. Sure enough the younger LOOKING pullets layed first.
Well I got a mix of pullets from feed store 5/20 RIR, SLW, BR, and 2 EE, BO--my EE looks ready and 1 of my SLW looks ready, 1 of my BR looks ready...not sure wahat may happen...guess they will be ready when they are ready. Makes it like Christmas...go out everyday looking for a present never know what you may find....LOL