Sounds like it, it is quite rare but if you get two top dog cocks and put them together you'll end up with one or sometimes none, i've seen them kill each other.
Youngsters, newcomers etc usually are a bit submissive initially though.
If i'm running some adults together I like to cage them beside each other for a few weeks and lets them fight it out through the wire, they seem to get the message than they can't win, it does help