Although the Ratshire Terrier hybrid has been around for a while, they still do not have a history of their own so you have to go by the backgrounds of the Rat Terrier and the Yorkshire Terrier. The Rat Terrier is an American breed that was bred from Toy Fox Terriers, Bull Terriers, Manchester Terriers, English White Terriers, Whippets, Greyhounds, and Beagles. They were developed to create a good hunting dog that was small enough and fast enough to hunt rats and other vermin both under and above ground. They were so good at this job that they became the most popular dog to work on the American farm. Soon, they became popular as house pets when their owners noticed their sweet disposition and bravery. United States President Theodore Roosevelt moved into the White House with several of these dogs that were later named Teddy’s Terriers. While it was bred in the 1800s, it was not really popular in America until the late 1900s. In fact, they were not recognized as a breed until 1999 when they were noticed by the United Kennel Club. It was not until 2013 that the Rat Terrier was finally acknowledged by the American Kennel Club, where it is the 96th most popular dog breed. The Yorkshire Terrier got the name from where they originated, in Yorkshire, England in 1861 when it was bred from the Dandie Dinmont, Manchester, Paisley, Waterside, and Skye Terrier. They were also used for hunting vermin but eventually ended up as lap dogs due to their small stature, beauty, and lovable personality. They were accepted and recognized by the American Kennel Club in 1885 and are the 9th most popular dog in America.