How old is your roo? Mine did not start this behavior until 8 months. My sister's roo became this way about 7 months. They were perfect and docile and then all of a sudden became protective.This has not been my experiance. Clovis is protective but not agressive to people. Mind you he does not think he is the biggest rooster on the property. My guinea is the king of the roost and he keeps everyone in line.
They are not at all aggressive towards other roosters. Just protective of the flock.