I have one black sexlink whose comb has not grown much nor has it started turning red yet. The chick is about 16 weeks old now. It's wattles are also small -- they are just beginning to turn red. All the other chicks I got at the same time have much larger wattles and combs -- and they are all red. All but one are sexlinks -- and I suspect has many different crosses rather than just two. She seems very healthy. Has anyone else had a chicken with this slow of growth to the comb?