I have some standard barred rocks and a white rock that I'm wondering if it might be a bantam. It's about half the size of my barred hens, but it's only 13 weeks old. Does that sound right for a standard or could she be a bantam? She came from randal burkey, and I don't see that they sell bantam white rocks. She was a "packing peanut" though, somehow I got lucky and she's a she.