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From Wikipedia:
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The grey wolf or gray wolf (Canis lupus), also known as the timber wolf or simply wolf, is a mammal of the order Carnivora. The gray wolf is the largest wild member of the Canidae family and an ice age survivor originating during the Late Pleistocene around 300,000 years ago. DNA sequencing and genetic drift studies indicate that the gray wolf shares a common ancestry with the domestic dog, (Canis lupus familiaris) and might be its ancestor. A number of other gray wolf subspecies have been identified, though the actual number of subspecies is still open to discussion. Gray wolves are typically apex predators in the ecosystems they occupy. Gray wolves are highly adaptable and have thrived in temperate forests, deserts, mountains, tundra, taiga, grasslands, and even urban areas. |
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The Rottweiler, or Rottweil Metzgerhund, is a large dog breed originating in Germany as herding dogs. It is a hardy and very intelligent breed. Early Rottweilers worked as beasts of burden, carrying wood and other products to market. During the first and second World Wars, Rottweilers were put into service as war time guard dogs. Currently they are frequently used as guard and police dogs. The Rottweiler was first recognized by the American Kennel Club in 1931.
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