Neutering can help with this. Also, if you move the cage in your room, you might be able to spend a few nights yelling at them to cut it out when they start. I -may- have stopped my girls fighting like this. Or they established dominance and quit, who knows.
Just keep an eye on it. A couple bites isn't the end of the world, if it gets really bad then you may need to neuter or separate. They may just be going through a power struggle, which will get settled.
Just keep an eye on it. A couple bites isn't the end of the world, if it gets really bad then you may need to neuter or separate. They may just be going through a power struggle, which will get settled.