New to chicks. Help me with the breed

[Jenn79]

Hello, I'm new to raising chickens. We have 4-5 week old chicks. We got them from the local farm. I think they might be mixed breeds. We are in a colder climate so I was told they are cold hardy breeds.

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I have three that look like this one.

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And three that look like this one.

Another pic of the black one

Thanks for any help!

 

[Chicken Girl1]

The first one looks like a mix and with a rose comb it is possible it is part Wyandotte. The black one looks like a BSL (black sex-link).