The "Encyclopædia Britannica" traces what was the "designer dog" fad to the late 20th century, when breeders began to cross purebred Poodles with other purebred breeds in order to obtain a dog with the Poodle's hypoallergenic coat, along with various desirable characteristics from other breeds. The primary identifying mark of a designer dog is that the resulting puppies are called by a portmanteau word made up of syllables (or sounds) from the breed names of the two purebred parents, such as Schnoodle (Schnauzer and Poodle cross). or Shepsky (German Shepherd Dog/Siberian Husky cross). Other purebred breeds are being crossed to provide designer dogs described with an endless range of created labels, such as the Puggle ("Pug" and Bea"gle" cross). There are even complex crosses (with multiple breeds in recent ancestry) being labeled in this manner, such as German Chusky (German Shepherd Dog, Siberian Husky and Chow Chow cross).