I have an EE, and a blue production (maybe?) and an orpington (maybe?) born around about 4th of July or sooner (they were about 10 weeks on Sept 11)....anyway the blue production has a very tiny comb maybe 1/4" at most, the others, none. My leghorns were faster to mature, but then leghorns are. These gals are already about leghorn sized. They are not laying yet (which seems to come after combs.)