Domestic dog, dog, dog, pet - domesticated form of gray wolf, canidae predatory dog ( Canidae ), considered by some to be a wolf subspecies, and by others for a separate species [descriptive footnotes], described under the synonymous names Canis lupus familiaris or Canis familiaris. Since his domestication, many breeds have arisen, differing considerably in morphology and functional traits. Primary races arose mainly as a result of environmental pressure. Contemporary races were obtained as a result of artificial selection. The variety of dog breeds, both in terms of construction and disposition, has been the subject of research among others A group of international researchers from the universities of Utah and the British Waltham Center for Pet Nutrition, which belong to the Mars corporation, which is a producer of dog food.
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