There is some confusion between the rat terrier and Teddy terrier breeds. That's because there's an unfounded rumor that Teddy Roosevelt named the rat terrier when his dog eradicated vermin in the White House. It is not fully confirmed which type of terrier that he owned, however, the Teddy Roosevelt terrier pays homage to the dog-loving 26th President of the United States. Teddies have longer legs than rat terriers, otherwise, they are very similar in nature and physical characteristics.