Breed this chick could be?

[highrockieschic]

I got two of these from Murdochs thinking they were easter eggers, but they have a single comb. I called the store and they said they got a batch of mixed brown layers and they mixed them in with the buff orpingtons and easter eggers (and didn't tell the staff). They told me the chicks could be red sex link or buff rocks. I've never had either. Any way to tell?

 

[BantamLover21]

Probably Red Sex-links.

 

[drumstick diva]

red sex link