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OKAY so guinea pigs need friends because they need to be able to be to have a friend. guinea pigs can be just like people they can get sad if they have know one and get very depressed and can not hang out with you or not eat if you only have 1 guinea pig maybe you should get another friend please reminder that any guinea pigs from the opposite sexs would have baby's so please be aware of what gender they can be.? THXS hope this helps to get your parents to get you another one or for your sad guinea pig ??.