Peaches did end up getting her friend, a short-haired Guinea Pig named Creamer.
They were hesitant of each other at first, but quickly warmed up to one another and now spend the days and nights chasing each other around, and cuddling up and watching movies in a fuzzy blanket with Mom and Dad. Their favourite foods are carrots and sweet peppers.
I was skeptical at first, but Guinea pigs truly are easy to care for, and relatively inexpensive.
I would highly recommend them to anyone looking to have a simple household pet, or parents looking to teach their kids some extra responsibility.