I have a 3 1/2 week old barred rock that looks pretty convincing to be a boy - very pale legs, and paler feathers than his 'sister', although he has feathered out much quicker than her. I'm wondering about his comb though - it doesn't look like it's going to be a single comb (? maybe rose). I purchased my chicks from a heritage breeder so pretty sure of his heritage but seeking any advice? The last picture is his 'sister'.