I have one guinea pig that serves as my classroom pet, and it's the first time I have ever owned a guinea pig and he is so sweet. I have a huge play pen that i let him run around in a few hours a day, and he my cat get along so well. They chase each other and play. I really would like to get another guinea pig, but I'm worried about how they will take to each other. My husband thinks they will be fine, since the one I have now gets along well with my cat. I just think he will be lonely back at school without my cat to keep him company. Any help/advice please! thanks!