I did retrain a little Japanese bantam roo that I really loved and had made a pet of. I learned my lesson with him. My roosters are now great defenders of the girls but give me total respect.
LOL I had to check a hen the other day in the coop. She gave out an alarm call and two Roos came running. It was kind of comical to see them skid to a halt when they realized who was "threatening" their lady. They kinda acted very nonchalant then and wandered around like they didn't have any real purpose there, then left. I wondered what they would do if they thought I might actually hurt a hen. I found out.
Unfortunately with kids it's harder. Some animals can respect what's yours, but chickens just don't think that way. Everyone participates in the pecking order on their own merits.