Just wanted to share a cool fact i learned about guinea pigs. Did you know that there used to be giant guinea pigs roaming the earth? They were 9 feet tall and could swim in the water (semi-aquatic mammals). They were called the Phoberomys Pattersoni aka "guinea-zilla." My source: http://www.guineapighub.com/guinea-pig-facts.html I also want to try to start a thread here for cool guinea pig facts! Anything else you've learned about these awesome little critters?