I have two male piggies named Ollie and Oscar. Ollie just turned 6 months and Oscar is about 3 months. I keep them in a 2 by 4 C&C cage with a 1x2 upper level. Two days ago I walked into my room (where they live), and I heard some teeth chattering. I sat down next to the cage to watch and make sure things don't get out of hand, and the chattering continued. I separated them, and they have been since then. I don't know what's causing the aggression. They've been living together for about a month and a half now and I've never heard any aggression whatsoever until now. Ollie is usually the one who starts and then Oscar follows. Is it because Ollie is maturing? Or is he just tired of Oscar annoying him? I'm not really sure what to do, I don't want to have them be separated forever.