Shih Tzu

The Shih Tzu (traditional Chinese: 獅子狗; simplified Chinese: 狮子狗; pinyin: Shīzi Gǒu; Wade-Giles: Shih-tzu Kou; literally "Lion Dog"), is a dog breed which originated in China. The name is both singular and plural. The spelling "Shih Tzu", most commonly used for the breed, is according to the Wade-Giles system of romanization. The Shih Tzu is reported to be the oldest and smallest of the Tibetan holy dogs, its vaguely lion-like look being associated with the Tibetan Snowlion. The Shih Tzu therefore also has the nickname "Tibetan temple dog". It is also often known as the "Xi Shi quan" (西施犬), based on the name of Xi Shi, regarded as the most beautiful woman of ancient China, and, less often, the Chrysanthemum Dog, because its face looks very much like the flower, and the Chinese or Tibetan Lion Dog. Owners often tie strands of fur from the shih tzu's head into a pony-tail that sticks up. This is called a topknot, and many different hair clips and bows are added to make the dog appear more "cute".

Temperament
The Shih Tzu is a friendly lap dog that at one time bred to be a companion dog for Chinese royalty. Some say living in the imperial palace gave the Shih Tzu an arrogant quality, although they also display qualities of devotion and adaptability. They are not afraid to stand up for themselves. They tend to be sweet, playful, and trusting as well. It ranks 70th in Stanley Coren's The Intelligence of Dogs, considered one of the lowest degree of working/obedience intelligence due to being stubborn and resisting being told what to do. They don't need as much exercise as working dog breeds, but do suffer from the same difficulties most as small breed dogs due to having a smaller bladder.

Golden Retriever

The Golden Retriever is a breed of dog, historically developed as a gundog to retrieve shot waterfowl and upland game during hunting. As such they were bred to have a soft mouth to retrieve game undamaged and an instinctive love of water. Their intelligence and versatility sees them employed in a variety of roles including illegal drug detection, search and rescue, as hunting dogs and as guide dogs. Its friendly, eager-to-please and patient demeanor has also made it one of the most popular family dogs (by registration) in the world today.

Temperament

The temperament of the Golden Retriever is a hallmark of the breed and is described in the standard as "kindly, friendly and confident". They are not "one man dogs" and are generally equally amiable with both strangers and those familiar to them. Their trusting, gentle disposition therefore makes them a poor guard dog. Any form of unprovoked aggression or hostility towards either people, dogs or other animals, whether in the show ring or community, is completely unacceptable in a Golden Retriever and is not in keeping with the character of the breed and as such is considered a serious fault. Nor should a Golden Retriever be unduly timid or nervous. The typical Golden Retriever is calm, naturally intelligent and biddable, with an exceptional eagerness to please.
Whether the object is a thrown stick, tennis ball, or flying disc, retrieving can keep a dog of this breed occupied and entertained for hours, particularly if water is also involved. Goldens might also pick up and "retrieve" any object that is near to them upon their masters' arrival, all of this lending to their retriever name.Goldens are also noted for their intelligence, and can learn up to roughly 240 commands, words and phrases. These dogs are also renowned for their patience with children.

What is a dog

The dog (Canis lupus familiaris) is a domesticated subspecies of the gray wolf, a mammal of the Canidae family of the order Carnivora. The term can also be used more generally to encompass any member of the biological family Canidae, the Genus Caninae (also called "true dogs"). When referring to Canis lupus familiaris, the term is used to specify both feral and pet varieties. The domestic dog has been one of the most widely kept working and companion animals in human history. There are estimated to be 400 million dogs in the world.The dog has developed into hundreds of varied breeds. Height measured to the withers ranges from a few inches in the Chihuahua to a few feet in the Irish Wolfhound; color varies from white through grays (usually called blue) to black, and browns from light (tan) to dark ("red" or "chocolate") in a wide variation of patterns; coats can be very short to many centimeters long, from coarse hair to something akin to wool, straight or curly, or smooth. It is common for most breeds to shed this coat, but non-shedding breeds are also popular.

The Scientific Classification of dog :
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Canidae
Genus: Canis
Species: C. lupus

Biology
Domestic dogs come in many shapes and sizes because they have been selectively bred for millenia for various behaviors, sensory capabilities, and physical attributes. Their morphology, although highly modified, is based on that of their wild ancestors, gray wolves. Modern dog breeds show more variation in size, appearance, and behavior than any other domestic animal. Within the range of extremes, dogs generally share attributes with their wild ancestors, the wolves. Dogs are predators and scavengers, possessing sharp teeth and strong jaws for attacking, holding, and tearing their food. Although selective breeding has changed the appearance of many breeds, all dogs retain basic traits from their distant ancestors. Like many other predatory mammals, the dog has powerful muscles, fused wristbones, a cardiovascular system that supports both sprinting and endurance, and teeth for catching and tearing. Dogs are more variable in size than any other domesticated animal.[citation needed] The smallest known dog was a Yorkshire Terrier, who stood only 6.3 cm (2.5 in) at the shoulder, 9.5 cm (3.75 in) in length along the head-and-body, and weighed only 113 grams (4 ounces). The largest known dog was an English Mastiff which weighed 155.6 kg (343 lbs) and was 250 cm (8.2 feet) from the snout to the tail. The tallest dog is a Great Dane that stands 106.7 cm (42.2 in) at the shoulder.