I have guineas and when the cocks reach adolescence it can result in a hell of a life for the lowest bird in the pecking order for several months of the year. I had to lock up a bad bully for 3 months last year because he was set on injuring my roosters and other guinea cocks. From your...
Probably most humane to sell or butcher it. If it can't get along anywhere on your property just leaving it to get killed slowly and torn up by the other birds is not a responsible way to keep livestock.