i bought assorted red chicks and they are now 3 weeks old, and I was wondering what type of comb shape they might start to develope. I have one that we are 99% sure he's a roo, because he has a bigger, pinker comb than all the rest. I was just curious if there were any signs of possible roos or pullets that could be determined from comb formation. thanks for the help. I can take pics if needed