Just let him loose and see what happens.. lol just be there to watch him.
If he only game rooster it'll probably be ok, as the others will just run from him.
If the game rooster runs from the big guys, then he is either too young, or doesnt possess gameness. Which could be problem because he could one day just destroy the big roosters without warning. Its worse between a fence... in open range, one will get hurt more... fences hurt both roosters adn there is no winner.
If he only game rooster it'll probably be ok, as the others will just run from him.
If the game rooster runs from the big guys, then he is either too young, or doesnt possess gameness. Which could be problem because he could one day just destroy the big roosters without warning. Its worse between a fence... in open range, one will get hurt more... fences hurt both roosters adn there is no winner.