What breed/gender are my tractor supply BSL's??

[Sparky43]

So i decided to get my first batch of chicks from TSC, and i decided to go with BSL's, so i dont end up with any roo's. Well, after awhile i started to get more and more suspect on the breed and gender. Their feathers are all black, with a beautiful blue/green sheen to them. I ignored the scratching and fighting they were doing, but amongst their chick noises, i could swear i hear some crowing. im hoping it is simply my imagination, but I would like some confirmation. they are all 8 weeks old. one of them seemed different from the start. slightly different coloring, and much more skiddish.

 

[mama24]

They look like black Austrolorps, and I see 3 probable boys.

 

[ramirezframing]

yellow feet bottoms= jersey giant pinkish white bottoms are australrops

 

[Hezz]

Looks like 3 Aussie cockerels in that bunch to me too.

Sorry...