I'm bonding my original guinea pig(Cookie) with a new guinea pig(Bubbles) after cookies cage mate passed. I've had them in their neutral area for about 5 hours, they haven't really fought and when they did it was very quick, no blood. They coexist pretty well and they don't go after each other but there is occasional teeth chattering from both of them and an occasional nip. Are they ready to be in the same cage? Bubbles is currently napping and cookie was earlier, they don't fight over hay or water or food.