The American Kennel Club, DogBreedInfo.com and the Dog Breed Info Center are all resources that have pictures of rat terriers. Breed information, characteristics and history are detailed on the AKC's website.
Rat terriers come in a variety of pied color patterns, meaning they have large patches of a single color such as black, chocolate, red or blue, in combination with white. An American breed, the rat terrier originated from crossing fox terriers with other European terriers in the 1800s. The AKC describes the rat terrier as a sturdy, athletic dog with a superior nose capable of hunting rodents, vermin or small prey above or below ground. They are a playful pet with a long life span and are suitable for children.