The only time I see any aggressiveness in my four girls is when one goes broody and sits on the
straw bales all day and then I have to pick her up and put her in the pen at night. For some reason, one the other girls always seems to peck at her just at that time.
Tiny-brained omnivorous feathered dinosaurs... as predatory as they are, that sort of sounds reasonable. And mine are named after old movie actresses, which makes the idea even more appropriate: Henrietta, Tallulah, Agnes, and Myrna.
Sue