Breed/Gender identification Chick #1

[wistlindixie]

Any help with breed/age is appreciated! I have three dark chicks. 2 are supposed to be blue orpingtons and 1 is a mixed breed. I'm not sure which are the orpingtons! All these are the same chick. I'm doing each chick separately on a post for identification. Thanks in advance!

 

[wistlindixie]

BTW, I'm thinking this one is a blue orpington.