As with all animals, the majority of the conflict that happens between roosters comes down to resources: food, water, space, or potential mates. By removing the females from the social structure, and from sight, a major reason for in-fighting is eliminated. With no females present, the males will establish their own pecking order, just as a flock of hens would, and the same process for establishing status and social structure will apply. The dominant male will take on the role of head of the flock, and will work to keep the others in line and protect them from danger. It may seem unnatural to house only males together, but roosters have been observed flocking with other roosters by choice in the wild and form very strong bonds with each other, just like hens.