The Rat Terrier was bred to chase and kill rats and other small vermin on the farms. They’ve been called Feists, and it was Teddy Roosevelt who dubbed them “Rat Terrier.” There are three distinct sizes of Rat Terriers – Standard, Mid-size and Toy, which weighs in at only about five pounds. You’ll find that Rat Terriers make excellent pets, watch dogs and hunting dogs. They’ve been mixed with a number of additional breeds, bringing out the best traits in all those dogs. Take a look at our Rat Terrier TShirt designs. Choose the one that closest depicts your favorite four-legged friend and create a perfect Rat Terrier Tank Top.