I bought 2 BA's from a local feed store as part of my first flock and I'm noticing differences between the two. They are both 7 weeks old and their feathers are both all black. However, one of them is pinkish/greyish on the underside of her feet and a pink comb while the other has a yellow comb and is yellow on the underside of her feet. The legs on both are black/dark grey. The one with the yellow coloring was a little slower to catch up to the others in size and I just assumed she was a runt or was getting bullied away from the food, but she has caught up to them now. I have pictures of their combs, although I did not get one of their feet yet. Here are pics of the two of them, yellow comb first: Any thoughts? Thanks!