So you think a zoo could have a group of chimpanzee's running around no problem? Doesn't matter what setup. Chimpanzee's are highly territorial and even kill other chimpanzee's.
Margaret Power wrote in her book The Egalitarians that artificial feeding systems even increased aggression in the chimpanzee populations.
I know it's a different animal, but I'm just saying because an animal is cute, 50 kg can still do major damage. And again, they were made to butt heads with each other, which is a sign of force and aggressive behavior.