Their long connection with humans has led puppies to be uniquely attuned to individual behavior and they are able to thrive on a starch-rich diet that would be insufficient for other canid varieties. Dogs vary in form widely, size and colours. Dogs perform many roles for folks, such as hunting, herding, pulling loads, protection, assisting police and military, companionship and, recently, aiding handicapped individuals. This effect on human modern culture has given them the sobriquet "man's best ally".
The word "domestic dog" is generally used for both domesticated and feral varieties. The English expression dog originates from Middle British dogge, from Old British docga, a "powerful dog breed". The word may possibly derive from Proto-Germanic *dukk?n, represented in Old English finger-docce ("finger-muscle"). The word also shows the familiar petname diminutive -ga seen in frogga "frog" also, picga "pig", stagga "stag", wicga "beetle, worm", among others. The term dog may derive from the earliest layer of Proto-Indo-European vocabulary ultimately.In 14th-century Great britain, hound (from Old English: hund) was the general word for those home canines, and dog described a subtype of hound, a mixed group including the mastiff. It is believed this "dog" type was so common, it eventually became the prototype of the category "hound". Because of the 16th hundred years, dog had become the general term, and hound got begun to refer only to types used for hunting.[ The word "hound" is eventually derived from the Proto-Indo-European term *kwon-, "dog". This semantic shift might be compared to in German, where the corresponding words Dogge and Hund retained their original meanings.A male canine is known as a puppy, while a lady is called a bitch. The father of an litter is called the sire, and the mom is called the dam. (Middle English bicche, from Old British bicce, in the end from Old Norse bikkja) The procedure of delivery is whelping, from the Old British word hwelp; the present day English phrase "whelp" is an alternative term for doggie. A litter identifies the multiple offspring at one labor and birth which are called puppy dogs or pups from the French poup?e, "doll", which has changed the more mature term "whelp" typically.The dog is categorised as Canis lupus familiaris under the Biological Types Theory and Canis familiaris under the Evolutionary Varieties Concept.In 1758, the taxonomist Linnaeus printed in Systema Naturae a categorization of varieties which included the Canis types. Canis is a Latin word so this means dog, and the list included the dog-like carnivores: the domestic dog, wolves, foxes and jackals. The dog was classified as Canis familiaris, which means "Dog-family" or the family dog. On another site he registered the wolf as Canis lupus, this means "Dog-wolf". In 1978, a review aimed at minimizing the number of recognized Canis varieties proposed that "Canis dingo is currently generally regarded as a distinctive feral domestic dog. Canis familiaris is employed for domestic canines, although taxonomically it will probably be associated with Canis lupus." In 1982, the first edition of Mammal Species of the World listed Canis familiaris under Canis lupus with the comment: "Probably ancestor of and conspecific with the domestic dog, familiaris. Canis familiaris has webpage top priority over Canis lupus, but both were printed all together in Linnaeus (1758), and Canis lupus has been universally used because of this species", which prevented classifying the wolf as the grouped family dog. The dog is now listed among the countless other Latin-named subspecies of Canis lupus as Canis lupus familiaris.In 2003, the ICZN ruled in its Point of view 2027 that if wildlife and their domesticated derivatives are thought to be one species, then the scientific name of this varieties is the methodical name of the wild animal. In 2005, the 3rd release of Mammal Types of the globe upheld Impression 2027 with the name Lupus and the word: "Includes the home dog as a subspecies, with the dingo provisionally distinct - man-made variations created by domestication and selective breeding". However, Canis familiaris may also be used due to a continuing nomenclature debate because wild and domestic animals are separately recognizable entities and that the ICZN allowed users an option concerning which name they might use, and lots of identified research workers prefer to use Canis familiaris internationally.
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