Can you identify these chicks?

[nessathegrape]

So I picked up my first brood on Saturday. Three barred rocks, one Rhode Island red, and one I cannot remember.

I know which ones are the barred rocks, but I can't remember which the other two are. Can anyone look at them and identify a type?

Also, one of the barred rocks is most likely a rooster...

 

[nessathegrape]

Pretty sure the RIR is the one with the yellow head. She looks much more like an RIR in pictures than she seems to in real life. That just leaves the brown one.

Also, with RIRs, if the black spot on the back of the head is missing that means it's a rooster right?