I had a barred Rock I hatched & raised. I handled him every day.. He used to come running to me to be picked up. Then when he was about 8 months old, He turned and every time I turned to leave the coop he would attack me, by jumping in the air and flying at me with his feet first, hitting me with his feet, sprus and also pecking at me. I would pick him up and carry him again, I threatened to put him in a stew pot.. I dusted him with a broom.. Nothing I tried worked.
It got to be where I had to leave the chicken coop backwards, cause he never attacked me when I was facing him. I couldn't break his attack habit. So I gave him to another farmer. And of course I told him about his being mean, and he took him anyway.
It is hard to see them turn on you, especially when you incubate & hatch them yourself.