Maybe I'm just crazy, but I've noticed that the Red SL girls that are mostly red are very aggressive and loud. I used to have one that was mostly red, and I ended up getting rid of her because she never let new members into the flock, and was always chest-bumping everyone. Most of my flock is so docile that they didn't even understand what was going on when she did it. She was just being nasty, not putting down a challenge to her 'authority'.