Newfoundland. Originating in Newfoundland, it is easy to understand why this dog loves the water. A large and strong dog, the Newfie has been used to help fishermen, pull heavy carts and rescue people from a potential watery grave. Today the Newfie adores his family and still loves a nice swim in a lake.

Portuguese water dog. Bred to help the fishermen of Portugal, it is no wonder this dog is as happy on land as he is in the water. Historically used to send messages from boats, the Portuguese water dog still loves to jump in the lake, pond, sea, or any body of water.

Rottweiler. Despite his current reputation, the Rottweiler was originally developed as a herding dog. His size and strength quickly led him to a more productive life as a protector and guardian.

Saint Bernard. No other dog has been as strongly linked to a barrel of whiskey as the Saint Bernard. Companions of Monks, the Saint Bernard has saved many people who have been lost or injured in the frigid Swiss Alps.

Samoyed. The Samoyed is an ancient breed who has spent the majority of his life in the company of humans. Used as a sled dog, these dogs are able to pull about 1 1/2 times their own weight in equipment and supplies. Known for his smiling face, the Samoyed is a happy and highly intelligent dog that readily protects his home.

Siberian husky. This beautiful and regal dog has been used to pull sleds in arctic countries for centuries. Originating in Siberia, this breed was very important in the 1925 "diphtheria serum run" that saved the lives of hundreds of Alaskan children. This run later became the Iditarod.

Standard schnauzer. Like his larger relative, the standard schnauzer is also a working dog. The breed hails from Germany, and was used in hunting and guarding. Originally classified as a terrier, the standard schnauzer quickly proved that he is more of a working class dog. Strong and tough, this breed is an excellent family dog and readily protects his house and home.

Tibetan mastiff. The Tibetan mastiff is an ancient breed known for its excellent guarding skills. Hailing from Tibet, the exact origins of the Tibetan mastiff are a mystery but many feel that this breed is from the same basic stock as other mastiffs and large working dogs.