German Shepherd
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The German Shepherd, also known in Britain as an Alsatian, is a German breed of working dog of medium to large size. The breed was developed by Max von Stephanitz using various traditional German herding dogs from 1899.
Adult male
Illustration from 1909
Sable bitch (left) and dog (right)
Skeleton in the Museum of Veterinary Anatomy of São Paulo, Brazil
Wolfdog
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A wolfdog is a canine produced by the mating of a domestic dog with a gray wolf, eastern wolf, red wolf, or Ethiopian wolf to produce a hybrid.
An Arctic wolf/Alaskan Malamute hybrid from Lobo Park, Antequera
Genetic research has shown that wolves with black pelts owe their coloration to a mutation that first arose in domestic dogs.
"Mixed breed Dog and Wolf" from The Menageries: Quadrupeds Described and Drawn from Living Subjects by William Ogilby, 1829
A Saarloos Wolfdog