The Complete Dog Breed Book
The evolution of the dog from wild predator to
domestic companion has been greatly influenced by
human intervention. It has taken just a few hundred
years to produce seemingly endless variations on the
canine theme – but planned breeding has not removed
the basic characteristics of the dog’s ancestor, the wolf.
Evolution of the dog
All dogs share a common ancestor: the grey wolf. While
this relationship is fairly apparent in breeds such as the
German Shepherd or Spitz-type dogs, with their wolf-like
heads and pricked ears, it is hard to see the connection
between wolves and Toy Poodles or St. Bernards. Genetically,
however, any dog of any breed is virtually identical to the
wolf. The transition from wolf to the huge diversity of
domestic dogs known today happened relatively quickly. The
process began gradually, with random changes in size and
shape, but accelerated when humans began to selectively
breed those dogs that exhibited characteristics they desired.
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