What are These 3 Week Old Chicks? RIR's? Sex Links?

[bremat]

We bought eggs to hatch and were told they were RIR's, but now I am beginning to wonder if they are really sex links. One of them is really a lot lighter colored with a lot of white on it and it is starting to show some pink in its comb and some roo-like behavior. The other 4 are more red and have more yellowish combs. So, do you think the lighter one is a roo and the rest are pullets? Which breed do you think they are? The pictures are from when they were 3 weeks old. They will be 4 weeks old tomorrow. I just noticed the comb color changing today, so it will not show in the pictures. I can take new ones if I need to. Thank you!
This is the one that I was thinking might be a roo.

2 of the others

another one

 

[PotterWatch]

The two bottom pictures look like RIRs, but the top one definitely isn't.

 

[bremat]

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OK, so what could he be? Any ideas?

 

[CoyoteMagic]

I think he is a red sex link roo in making. They take on the coloring of the father. Probably a NH White

 

[bremat]

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So, does this mean that the other 4 are red six link pullets?

 

[chickenlady81]

I have no clue but I think there cute cute cute..lol

 

[countrybum]

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They are baby chicks.

The top look like EE chicks, seem like the both have the fuzzy faces and the bottom looks like a Campine.

 

[CoyoteMagic]

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So, does this mean that the other 4 are red six link pullets?

The others look like RIR's to me. My red sexies have more white in there tail areas. Each one to a different degree. I have one that has a red chest but the rest of her looks like old lace, we call her Lace