Is this a Black Sumatra?

[Chickengirl47]

This is Joy, she is six weeks old. I'm pretty sure she is a Sumatra, but I just want to make sure, because now she has a few white feathers instead of all black feathers like I thought she would have. Thanks!

 

[Wyandottes7]

Looks like a Sumatra to me.

 

[BantamLover21]

Looks like a Sumatra to me.

x2