That's odd that the RIRs are aggressive, but I guess it all depends on the chicken. I have buttercups which everyone says are flight but mine are friendly, not like my RIR but they don't freak out when I'm in the penOf the breeds that I've had this spring, (Dominique, BSL, RIR, EE) I found that the RIR have been the most aggressive, the BSL, Doms, and EE have been friendly and not aggressive. My best 2 egg layers are BSL and RIR, neither one has missed a day in 2 weeks). EE are giving me 6 eggs/week. I don't have a laying history for the Doms as they ended up being all roosters... I guess I could say that my Doms were pretty poor layers!! Check out Henderson's chicken breed chart.