a mom of 3 i have rir the heritage kind ...the roosters are not mean or aggressive toward humans even kids.. the ones from the hatchery are very mean and aggressive will attack most kids and some will attack u too. the reason is simple we select heritage ones for mild temperment the hatchery on the other hand uses flock mating for the most fertile eggs they can get with several roosters in with several hens. the most aggresive rooster get the most hens mutiply x 50 generations and millions of chicks a trait aggresive comes out. if you want a red rooster get a heritage one. 
