Both are roosters. You shouldn't have a problem with fighting since they grew up together. One may be more dominant, but generally I don't have issues with more than one rooster as long as they grew up together.
The issue you may have is overbreeding a single hen. For that reason, I would either look into getting a few more hens (If you don't have others already) or choose to keep just a single rooster. Overbreeding can really stress out a hen and can also ruin the feathers on their backs.
The issue you may have is overbreeding a single hen. For that reason, I would either look into getting a few more hens (If you don't have others already) or choose to keep just a single rooster. Overbreeding can really stress out a hen and can also ruin the feathers on their backs.