I have 2 silkie roosters in a pen with their hens, and they really dont fight. There might be a little squabble here and then, but otherwise they are good.
I have 4 Silkie roos in a pen together and then 2 others in another pen together. All are less than a year old.
Yes, they do fight. Not too badly but enough for some messed up top hats and on occasion a bloodied comb. I am certainly trying to get rid of a few to lighten the load.
Maybe mine fight because of so many hens walking past their pens while free ranging stirs them up. I just thought that in a 30x30 pen that 4 roos could stay out of each others way but they still squabble some.
And boy, they are funny at it, too.