I'm looking to add a few chickens to my flock this spring. I've read that the buff Orpington is a really docile, winter hardy breed(I'm in upstate ny). I've heard some mixed reviews about adding them to a mixed flock as they might get picked on. I currently have Wyandottes, barred Plymouth rocks, welsummers and 1 EE. Has anyone had an issue adding them to a mixed flock? Thanks!