jury still out on the black one, its a copper maran.. hoping girl.. had two and one was clearly a boy (see pics below he was blue).. comb has not changed much .. still crossing my fingers..
Appears to be some confusion here as the burd in question is the bird posted in the 1st post by the OP. The other birds posted are from another member showing an example of their Brown Leghorns.
To the OP, your bird is looking built more like a well summer at this point. While ear lobe color is the differentiating point, it does not develop for a few more weeks. That is the point at which it will become the telling sign