Which breed of chickens do you have that are the friendliest? My 2 Buff Orpingtons seem to be a lot more social than my 2 RIR'S. How do I get my others to be more social? They all come running to me when I call them but my RIR'S wont eat from my hands or really let me hold them like my Buff's do. What am I doing wrong? Please help.