black bantam breed?

[DomesticGoddess]

I got these little black ones at the feed store bargain bantam pullet bin. You can see the size difference of my standard red sexlink chick of the same age. Can anyone tell me the breed? They are completely black except for a white patch on the rear end.

http://i1299.photobucket.com/albums/ag61/Tammi_VanDyke/e9522527-5eb9-4fbb-
9a35-d3d919b4a455_zps58b8631f.jpg

 

[DomesticGoddess]

Japanese?