The Pug is a small breed of dog with a wrinkly, short muzzled face . The word "pug" may have come from the Old English pugg or "puge", which were affectionate terms for a playful little devil or monkey. Pug puppies are often called puglets. The breed is often summarized as multum in parvo ("much in little"), describing the Pug's remarkable personality despite its small size.
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While most Pugs appearing in eighteenth century prints tended to be long and lean, modern breed preferences are for a square, cobby body, a compact form, a deep chest, and well-developed muscle. Breeding preference goes to "button" Pugs. The legs are very strong, straight, of moderate length, and are set well under. The shoulders are moderately laid back. The pasterns are strong, neither steep nor down. The feet are neither so long as the foot of the hare, nor so round as that of the cat; well split-up toes, and the nails black. Dewclaws are generally removed. The lower teeth normally protrude further than their upper, meeting in an under-bite.
Bred to adorn the laps of the Chinese sovereigns during the Shang dynasty (before 400 BC), in East China, they were known as "Lo-Chiang-Sze" or "Foo" (ceramic foos, transmogrified into dragon, with their bulging eyes are very Pug-like). The Pug's popularity spread to Tibet, where they were mainly kept by monks, and then went onto Japan, and finally Europe.
This breed may also be referred to as a "Lion Dog" or "Foo (or Fu) Dog" due to its resemblance to Chinese guardian lions just like the Pekingese dog breed from China of similar origin and resemblance to Chinese guardian lions which are considered a guardian spirit.