Standing two foot tall at the shoulder, weighing in at 100 pounds and resembling a giant guinea pig, Caplin Rous is the most famous capybara in the world. With a Twitter following of 3,377, three year old Caplin Rous is as house trained as a dog and even manages to stand on his hind legs for owner Melanie Typaldos, 55 at their Buda, Texas, home. Acting as an ambassador for capybara's the world over, Caplin Rous and his wild relatives are recognised as the largest species of rodents in the world. Picked up from a traveling fair in Macogdoches, Texas weighing only four pounds and 11 days old, Melanie paid a little under £200 to take baby Caplin Rous home.