I have 4 guinea pigs and I recently got a fifth from a rescue. I went to do a soft introduction today as their cages have been next to each other for about a week, and they have been interacting and getting used to each other from the safety of their own cages. Immediately, the alpha of my herd and the new guinea pig started fighting and trying to attack each other very aggressively. I threw a blanket on them and stopped the introduction right there. This new guinea pig is about 3 months old, so I am not sure why this occurred. I expected her to be passive, and I have never had a fight break out between my guinea pig before to this caliber. Is this fixable? Will they ever get along at this rate? They didn't even bat an eye before going straight into attack mode. I want to know how to address this because I don't want the solution to be that they have to live separately if it's not necessary.