well, I had a flock of them a few years ago, and they wanted to eat me. one even jumped up and pecked me in the eye! but that may have something to do with the fact that she had a rough childhood, half her hatch mates were eaten by a raccoon one night.
separate the one being picked on, and separate the Rhode Island. in my experience, Rhode Island Red chickens are much more aggressive compared to Australorps and Plymouth Rocks.