I currently have 9 chickens, 2 Rhode islands, 3 Delaware Orphingtons, and 4 Black Sex Links (Black Star). A few weeks ago, I took my little 3 year old sister into the chicken run, which is 20 x50 feet, and she sat down on the floor, and all the chickens came running to say hi. She was sitting still, just enjoying the chickens picking at the ground around her, when all of a sudden, one of my Rhode island (she was actually one of three Rhode islands), flapped her wings and pecked my little sister in the eye! That chicken was eaten that night by a wolf lol, but my sister is okay. 2 weeks ago, one of my Orphingtons started trying to peck at me, going nuts and clucking like crazy. She is still acting up today. Yesterday, another one of my Rhode islands flew up and pecked my 6 year old sister in the arm, drawing blood. Every time before we go into the run, we go over the "No-No's".No-no #1: screaming. Only whispers. No-no #2: stomping. Only quiet small steps. No-no #3: no red clothes or items. (We check this inside the house) So I just don't know why they're being this way. My siblings love the chickens and would hate to have to stop seeing them. What could I do to prevent it? Why is this happening? Any suggestions would be much appreciated. Note: we are pretty sure they are all hens, as they are all laying eggs.