Where did the name rat terrier come from?

The name "rat terrier" originates from the breed's historical purpose as a small, agile dog bred for hunting and exterminating rats and other vermin on farms and in homes. The term "terrier" reflects their lineage, which includes various terrier breeds known for their tenacity and hunting abilities. These dogs were particularly popular in the early 20th century in the United States, where they were valued for their skill in pest control. Over time, the breed has evolved to also serve as a companion animal.