my 5 month old Speckled Sussex attacked me about 2 weeks ago. but i believe she had a good reason. i have 1 month old chicks and i keep them in a grow out pen during the day, and transfer them to a "chick coop" at night. well, i was in the process of transferring them....and she always seems VERY interested in the little guys. watching them in their pen, close up, etc. well, one morning during the transfer, i put a little chick kinda close to her so she could "socialize" with it....i was holding the baby. as i lowered the chick, she got this crooked stance with one shoulder/wing (do chickens have shoulders? lol) down, and the other one up. i took that as a sign of aggression and immediately stood up and then she attacked my leg!!! i scolded her with my voice (not yelling though) and went about my business. she's a great girl otherwise. and i wasn't mad at her cuz i figured she was ticked off at the baby. but your situation sounds different. i hope we hear back from you and see a pic of the perp.