Best guess as to what breed this black chick is?

[Bobbimarks]

Trying to figure out the breed of this chick. Thought at first it was maybe an Australorp, but I am having second thoughts. Anyone know? Mostly black with black feet a little bit of yellow under neck and belly.

 

[Bobbimarks]

Here's the pic...oops! Lol!

 

[Bobbimarks]

And she has 5 toes...
We have another that looks very similar but has 4 toes.

 

[keesmom]

Where did you get them? Is it possible they are mixes?

 

[Bobbimarks]

We picked them up at our local Tractor Supply.
Upon further inspection, we noticed a little feather growing out of each leg...so maybe a silkie mix or something?