Check out the Ameracauna section in the "Breeds and Genetics" - there is the sweetest pic there of an Am. roo w/his wings over his hen & chicks. I asked the same question there & several people said their roos were nice. After several really bad experiences w/other breeds, I have a 4 month old Ameracauna roo I just put out with the main flock & so far, so good. He has been very nice since birth & I am hoping he continues to be. I know all of my hens are nice and easygoing, not aggressive to the others or to each other.