I believe these chicks are about 9 weeks old. These two have the most developed comb and wattles. Although not all that much more than the others. Do you think they are roosters? I keep going back and forth. Maybe there is just some variation among hens for comb size? I keep trying to see if they have pointy longer saddle feathers but I just cannot really tell. Another that I am sure is a hen is slightly bigger than these two. Here is a pic of the group but I don't think it helps much. lol!