Where did you get them? If it's black with leakage, it's probably a mix. If they came from a hatchery you might have a pair of sex links, a Red Sex Link and a Black Sex Link.I don’t think it’s an Australorp, but it could be. I took a look at a bunch of Australorp chicks n they were a tad bit too white. She’s got a bit of brown on her as well.