I have noticed that as well. I had a Maran cockerel in with a Production red cockerel, as well as a big ol' Brahma cockerel. The Red and the Brahma had so many squabbles, but my Maran never had any issues.
I have been doing quite a bit of research, and I plan to get a puppy who will do well in a family environment. But, I do want to enroll him in personal protection classes to give him a job, and so he must have an off switch.Who did you purchase Singe from?