Barred Rock or Cuckoo Marans

[popsicle]

Ok, probably early, but is there any way to tell if <week old chicks are Barred Rocks or Cuckoo Marans?

My chicks seem to have white/pink/black beaks, and white/pink with gray legs... The yellow tinge in the photos is from the light:

 

[Mr MKK FARMS]

Barred rocks!

 

[popsicle]

Thanks! Now, what do you think... two pairs? Most of my barred birds were gotten either in singles or as started pullets--so I'm not so good at guessing gender on Straight Run.

I think the one in the bottom photo (same one as in the middle/bottom of the top photo) is male. Not so sure about the others.