Will two roosters raised together fight? The answer is to some degree while sorting out their position in the flock, YES. The severity of the fighting will depend upon the nature of the roosters. It may be nothing more than a couple of pecks, or in the case of gamefowl it can be knock down, drag out to the death. No hard and fast answer on this one. Keep an eye on them and intercede if necessary. Free range and lots of space really helps.