Guinea pigs can be housed together, as long as they are neutered if they are of the opposite sex. Sometimes they fight a little when they are first put together, but with some supervision to avoid serious injury, they usually establish their wn pecking order. Some unneutered males will fight for territory and may never be able to live harmoniously. Animals should be introduced in a neutral territory, such as a fresh, clean cage that neither has been in before. Separate them if the fighting is fierce so they do not injure each other and try again later. It may take a couple of days for them to ‘work it out.’ Sometimes guinea pigs will continue to squeak at one another intermittently and appear to be aggressive. Do not worry; they are likely just re-establishing the pecking order and should be given more time to figure out their relationship, as long as neither is getting injured.
Your veterinarian Wichita, KS is a valuable resource regarding your pet’s health and needs.
