The Australian Silky Terrier or simply Silky Terrier (depending on the breed registry) is a small breed of dog of the terrier dog type. The breed was developed in Australia, although the ancestral types and breeds were from Great Britain. It is closely related to the Australian Terrier and the Yorkshire Terrier. The breed is called the Silky Terrier in North America, but is called the Australian Silky Terrier in its country of origin and in the rest of the world.

The Biewer Terrier (/ˌbiːvər ˈtɛriər/) is a toy dog of German descent that is the result of two Yorkshire Terriers with a recessive piebald gene breeding. It is usually kept as a companion animal or a show dog. The Biewer Terrier was recognized by the AKC in 2021. Since May 2024 the Biewer Terrier is also accepted by the (VDH) Verband für das Deutsche Hundewesen in Germany.[1][2]

The Yorkshire Terrier, also known as a Yorkie, is a British breed of toy dog of terrier type. It is among the smallest of the terriers and indeed of all dog breeds, with a weight of no more than 3.2 kg (7 lb).[1] It originated in the nineteenth century in the English county of Yorkshire, after which it is named.[2] The coat is tan on the head and dark steel-grey on the body; no other colour is accepted by either The Kennel Club or the Fédération Cynologique Internationale.[1][3]