I have two RIRs, 10 weeks old. Whenever I let them out to free range, one of them sort of puffs itself up--fluffs up its feathers, lifts up its tail, and holds its wings out a little. What does that mean? I *think* they are both pullets...they look enough alike that I think they must be the same gender. So even if it is roo behavior, why aren't both of them doing it? I also have five BA pullets, and none of them do this.