I forgot, my brother ran his jr. boer buck with his sr. buck last year. His sr. buck really isn't that big of a bully though, and the little guy got along alright. David has a pretty big area for them.
I ran two buck the same size together last year, well they got in a fight and one broke his scur(Caesar is sick from the injury now) The dairy bucks are really bad about fighting, the boers don't seem as bad.