These are both supposed to be female runners, but one is heavier then the other. Does that mean anything? Could the thin black one be a male, or just a better bred runner....??? The black runner Fawn and white runner Also it appears my fawn and white may have a crest, does that have something to do with her being heavier, maybe crossed with a heavier crested breed. These are supposed to be pure breeds, they are also from Ideal.