Need help and advice.

So after getting home from work today I found that by roosters had started fighting out of nowhere, They are twin brothers and have spent every day together but for some unknown reason they apparently tried to kill each. One of the boys walked away with plenty of wounds but the other boy has lost a chunk of his beak right bellow the nostril the bleeding had stop by the time I got to them but I cleaned it and put medicine on it but I'm not sure if he's broken now can his broken beak grow back even if it's that far up and will the twin brother's ever be able to be together again?

Please if anyone has any idea I could use some real experiences.