My RIR is also the most aggessive of the group, she pecks at and chases my dog! She made me bleed yesterday during our after egg collection, treat feeding session, but I can't relly blame her. . . she just happened to upset a not quite healed blister on one of my fingers. She does peck at my feet when I come out into the yard (they free range), but only until she gets whatever treats I have brought, or has concluded that I have nothing this time. I am just totally captivated by the different personalities of my girls, and cannot imagine allowing a chicken to intimidate me! When I had geese and one of them got agressive, I became an expert at handling the situation. . . I guess I have so much animal training / handling experience (mostly dogs and horses) that this kind of thing has become instictive with me. . . never mean, but always firm and always always the "top dog". . . . The spay bottle trick is a good one with all sorts of domestic animals. . . it startles but does not hurt them, and they do learn that you have a way of discouraging them from unwanted behavior.