Almost every pair or group of guinea pigs will quarrel to some degree, but if you own guinea pigs it's important to know when your piggies need to be separated. First off, it's common for guinea pigs to "rumblestrut", or growl while circling each other. It's also common for them to chatter their teeth. This is most likely due to establishing dominance, especially if your guinea pigs have been recently paired. If your guinea pigs are biting or if you see blood drawn, then its time to separate them. You can separate them by using a cage divider so they can still see each other without hurting each other.
