Guess which breed laid?

[themenagerie]

I'm new to chickens & have a variety of pullets, a 14 week old Australorp, 13 week old GLW's, EE's, Speckled Sussex, Columbian Rock crosses, 12 week old BO's and BR's. SOMEONE laid their first pullet egg. I have no idea which one. My vote's on the Australorp..but the CR crosses are White Rock/RIR..so maybe they lay early? What do you all think?

 

[Momagain1]

what color is the egg?

 

[themenagerie]

Not green or blue, that would make it easier.
I just went down and looked at them and none of them have the bright red coloring I thought I would see in a pullet close to laying, though one of the BR's is redder than the rest.