The pictures are of my friend's hatchery SLW chick approx. ~5 weeks old. Pullet or roo? The legs seem thick to me and the comb has some red color. I've heard that males don't have much of a tail at this stage though and this chick has a big tail like my SLW pullets. One of my same aged pullets (not pictured) also looks like the one in the pictures except the comb is a bit smaller (still single combed though) and yellow. Another possible roo?