The dog (Canis lupus familiaris, pronounced /ÃÂkeê.nis ÃÂluÃÂpÃÂs fÃÂÃÂmêliÃÂÃÂris/) is a domesticated subspecies of the gray wolf, a member of the Canidae extraction of the order Carnivora. The domestic dog has been separate of the most widely kept working and companion fish in human history. The domestication of the gray wolf took hole in a handful of events roughly 15,000 years ago in central Asia. The dog quickly became ubiquitous across culture in all parts of the world, and was extremely valuable to brand-new human settlements. For instance, it is believed that the efficacious emigration across the Bering Strait might not have been possible without sled dogs. As a close of the domestication process, the dog developed a sophisticated intelligence that includes unparalleled social cognition and a simple guesswork of mind that is important to their interaction with humans. Currently, there are estimated to be 400 million dogs in the world.
Over the 15,000 college year span that the dog had been domesticated, it diverged into only a handful of landraces, groups of allied brute creation whose morphology and behavior have been shaped by environmental factors and occupational roles. As the contemporary understanding of genetics developed, humans began to intentionally breed dogs for a ample earshot of specific traits. Through this process, the dog out-of-date developed into hundreds of varied breeds, and shows also behavioral and morphological variation than any other land mammal. For example, height measured to the withers Dog Training ranges from a few inches in the Chihuahua to a few feet in the Irish Wolfhound; color varies from white through grays (usually called "blue'") to black, and browns from light (tan) to dark ("red" or "chocolate") in a wide variation of patterns; coats can be short or long, coarse-haired to wool-like, straight, curly, or smooth. It is common for most breeds to shed this coat, but non-shedding breeds are also popular.