Hi all, First time raising backyard chickens. I was hoping for 4 pullets, but now I'm afraid I have 3 roos! They're (supposed to be) blue orpingtons who just turned 3 months old. One of them (in a single-chicken photo with large comb and an upright tail) is almost definitely a roo -- he's always guarding the others and acting generally more aggressive, and we've heard him make little crowing sounds. One of the others (alone in another photo, bent over on top of the coop ramp) is almost definitely a pullet. She has the a very small, light colored comb, and none of her behaviors or saddle feathers or anything else point to roo. However, we can't decide if the two others (shown together in the last photo) are roosters too? Both of them have a mix of pullet and roo features! Medium-sized/medium-colored combs and wattles. The one in front has a bigger wattle on one side but almost no wattle on the other. We've noticed that two of them (the rooster and the unsexed chicken in the front of the photo) have more of a speckled/barred coloration on their neck and saddle feathers, while the other two are more uniformly gray. Is this an indication of sex? We've also noticed that the roo holds his tail upright and his tail feathers seem a little more curved and short. Is this an indicator? Thanks for your thoughts!