I got a black chick from Tractor Supply about 5 weeks ago, it just said straight run and everyone was black. Well, now it has a single comb and it's barred with black and white, mostly white though. My question is, beside Plymouth Rock, what other breed is barred with a single comb? I was thinking it's a Roo, but it's 1/2 the size of my Australorp and Copper Marans chicks of the same age that I know are pullets. Also, it doesn't have pointy hackles or a Roo tail. I'm really confused. Thanks in advance.