Who was talking about acting like animals? I believe they all have such strong individual musical visions that if they'd have to compromise, it wouldn't be as good as it would be if they wouldn't need to - which means that collaborating with each other would decrease the quality of their visions. Or they might just click and make the most awesome music ever. Either way we can't know for sure before they've given it a shot, so we have to speculate and my belief is that they wouldn't create something as good as they would do on their own.