Newfoundland is one of the gentle, intelligent sweet-tempered, dog breeds in the world. But their lifespan is limited to 8-10 years. Newfoundland breed is prone to various health problems. Like all other breeds, you should give proper care and healthy diet to raise a healthy Newfoundland dog. If you looking for a guard dog rottweiler could be a right choice for you. This large, strong breed is completely fearless, loyal, alert, obedient and confident. Unfortunately, this gentle giant only has a lifespan of 8 – 10 years. The Saint Bernard is one of the largest dog breeds in the world. Apart from their great size, Saint Bernards have been recognized for valuable contributions in Alpine rescue missions. But like other giant dog breeds, Saint Bernard has a very short lifespan, between 8 and 10 years. Bullmastiff is one the excellent pet you could own. This breed is very devoted to the family. Bullmastiffs are also loyal, loving, alert, powerful and courageous. One thing about bullmastiff that no dog lover ever like is its short lifespan. This loyal breed only live for 8-10 years. Borzoi is a tall dog breed that is known for its distinctive long head and beautiful silk coat. They come in wide, variety of colors including black, white, cream, red and fawn. But, this beautiful, gentle breed is prone to many health problems. The lifetime is limited to only 7- 10 years. Leonberger is a fearless, giant breed that known for its lion-like look. Male leonberger has a distinctive, lion-like mane on the neck. This breed is very loyal, obedient, companionable, affectionate and brave. The shocking fact about leonberger breed you should know is its shortest lifespan, only live for 8-9 years. The Irish wolfhound is one of the tallest dog breeds in the dog. They are originally used as a war and hunting dog. Despite his large size, Irish wolfhound is patient, generous, sweet-tempered and loyal. They can also get along well with children and other pets. If you ask what bad about Irish wolfhounds, the answer would be their short lifespan, only 6-10 years. Standing at 36 inches in height, the Great Dane is the tallest dog breed in the world. This giant breed is very gentle, loving, devoted and confident. The heavy body of Great Danes also the main reason for being one of the short living dog breeds. Native to mountains of Switzerland, the Bernese mountain dog is one of the largest and most beautiful dog breeds in the world. Bernese mountain dogs have thick fur to survive in the cold climate of Swiss Alps. This short living, gentle giant is very intelligent, loyal, affectionate and faithful. They have short lifespan, only 6-8 years. With an average lifespan of 5-8 years, the French mastiff is the shortest living dog breed in the world. They are very devoted, courageous,loyal and companionable. Weighing up to 68 kg, French mastiff is one of largest dog breeds in the world. Unfortunately, large dog breed has very short adult life and die soon.