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
Feist (dog) still often called "feists". The terriers brought to the US in the 1890s from England were crossed with feist dogs already here, in addition to some of the toy breeds (Toy Fox Terrier, Manchester Terrier, and Chihuahua) to develop the feist dogs known today. The word "feist" is described in" Webster's Third New International Dictionary" as from the obsolete word "fysting", meaning "breaking wind, in such expressions as fysting dog or fysting hound". Feist is defined as "1. chiefly dial: a small dog of uncertain ancestry..." The word feisty - "energetic, belligerent, esp. if small" is derived from the dog,