Dalmatian

The Dalmatian (Croatian & Bosnian: Dalmatinac, commonly misspelled as Dalmation) is a breed of dog, noted for its white coat with either black or liver spots. Although other color variations do exist, any color markings other than black or liver are a disqualification in purebred Dalmatians. The famous spotted coat is unique to the Dalmatian breed; no other purebred dog breed features the distinctive spotted markings.

St.Bernard

The St. Bernard Dog is a very large breed of dog originally bred for rescue and as a working dog. A full-grown male can weigh between 160 and 240 lb (73–110 kg) and the approximate height is 27½ inches to 35½ inches (70 to 90 cm).
Saint Bernards are one of the largest dog breeds.There are two varieties of the breed: the short-haired or smooth-coat variety and the long-haired or rough-coat variety.

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.

Chow Chow

Chow Chow, or Chow, is a breed of dog that was first developed in Mongolia about 4,000 years ago and was later introduced into China, where it is referred to as Songshi Quan (Pinyin: sōngshī quǎn 鬆獅犬), which literally means "puffy-lion dog."
It is believed that the Chow Chow is one of the native dogs used as the original model for the creation of Chinese guardian lions in ancient China when no one had ever seen a real lion before when stories reached China that Buddhist temples and monasteries in India were being guarded by the traditional stone lions found in front of Buddhist temples and palaces in India. Hearing the stories carried there by Buddhist monks traveling from India the Chinese sculptors modeled statues of Fu or Foo lions, the lions of Buddha after these native dogs and created an icon of an animal never before seen in China, the Chinese guardian lions.

Beagle

The Beagle is a breed of small to medium-sized dog. A member of the Hound Group, it is similar in appearance to the Foxhound but smaller, with shorter legs and longer, softer ears. Beagles are scent hounds, developed primarily for tracking hare, rabbit, and other game. They have a keen sense of smell and tracking instinct that sees them employed as detection dogs for prohibited agricultural imports and foodstuffs in quarantine around the world. They are popular as pets because of their size, even temper, and lack of inherited health problems. These characteristics also make them the dog of choice for animal testing.
Although beagle-type dogs have existed for over 2,000 years, the modern breed was developed in Britain around the 1830s from several breeds, including the Talbot Hound, the North Country Beagle, the Southern Hound, and possibly the Harrier.
Beagles have been depicted in popular culture since Elizabethan times in literature and paintings, and latterly in film, television and comic books. Snoopy of the comic strip Peanuts has been promoted as "the world's most famous beagle".

Poodle

The Poodle is a breed of dog, and is regarded as one of the most intelligent breeds of dog. The poodle breed is found in small, medium, and large sizes, and in many coat colors. Originally bred as a type of water dog, the poodle is skillful in many dog sports, including agility, obedience, tracking, and even herding. Poodles are elegant in the conformation ring, having taken top honors in many shows, including Best in Show (BIS) at the Westminster Kennel Club show in 2002 and BIS at the World Dog Show in 2007.
Health
The most common serious health issues of standard poodles (listed in order of the number of reported cases in the Poodle Health Registry (as of August 20, 2007) are Addison's disease, gastric dilatation volvulus (GDV = bloat/torsion), thyroid issues (hyperthyroid and hypothyroid), tracheal collapse, epilepsy, sebaceous adenitis, juvenile renal disease, hip dysplasia, and cancer. Standard poodles are also susceptible to some health issues usually too minor to report to the poodle health registry. The most common of these minor issues are probably ear infections. Ear infections are a problem in all poodle varieties. Ear problems can be minimized by proper ear care. A veterinarian should be consulted if the dog shows signs of an ear infection, lest a minor issue turn into a major issue.

From : http://en.wikipedia.org/wiki/Poodle