Toy dog term teacup dog, thus the toy/teacup boundary remains fuzzy. The standard size for a toy dog ranges from 4 to 7 pounds; anything smaller than the standard size of a toy dog may be a runt of a litter. No official size defines a teacup dog, but unofficially a teacup dog is considered to be a dog that is 17 inches or less and weighs 4 lbs or less at the age of 12 months. There are no specific teacup dog breeds, but popular types for breeding teacup dogs include: Shih Tzu, Chihuahua, Yorkshire Terrier, Poodle, Pug, Maltese, Pomeranian, and
Vulnerable dog breeds of the United Kingdom newest addition to the list, having been added for the first time in 2012. However, during 2012 the number of English Setter puppies registered increased to 314, so the breed was moved to the Kennel Club's "At Watch" list, which is for breeds with registrations from 300-450. Breeds on the "At Watch" list included in 2013 the English Setter, the Old English Sheepdog, the Irish Terrier, the Irish Wolfhound, the Welsh Springer Spaniel, the Pembroke Welsh Corgi, and the Welsh Terrier. Vulnerable dog breeds of the United Kingdom Vulnerable Native Breeds are a group of dog breeds originating in the