Capybaras are hefty South American rodents that are related to guinea pigs. Until recently, you were more likely to see them in zoos rather than homes, but they are becoming increasingly popular ...

It's one thing to get a goldfish because your daughter begs for one. It's quite another to end up with a hundred-pound rodent who has more than 2,700 Twitter followers. Caplin Rous is a capybara.