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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf.Also called the domestic dog, it was selectively bred from an extinct population of wolves during the Late Pleistocene by hunter-gatherers.
Canidae (/ ˈ k æ n ɪ d iː /; [3] from Latin, canis, "dog") is a biological family of dog-like carnivorans, colloquially referred to as dogs, and constitutes a clade. A member of this family is also called a canid (/ ˈ k eɪ n ɪ d /). [4] The family includes three subfamilies: the Caninae, and the extinct Borophaginae and Hesperocyoninae. [5]
The dogs were selectively bred as either sled dogs or as hunting dogs, which implies that a sled dog standard and a hunting dog standard existed at that time. The optimal maximum size for a sled dog is 20–25 kg (44–55 lb) based on thermo-regulation, and the ancient sled dogs were between 16–25 kg (35–55 lb).
Golden Retriever puppy Basset Hound Newborn Welsh Springer Spaniels. A puppy is a juvenile dog, generally one less than 12-18 months old.. Puppies are markedly underdeveloped and dependent on their mothers at birth (displaying altriciality), but healthy puppies grow quickly and begin walking thereafter.
A study of dog remains indicates that these were selectively bred to be either as sled dogs or as hunting dogs, which implies that a sled dog standard and a hunting dog standard existed at that time. The optimal maximum size for a sled dog is 20–25 kg based on thermo-regulation, and the ancient sled dogs were between 16 and 25 kg.
The post 23 of the Cutest Black Dog Breeds appeared first on Reader's Digest. All dog breeds are beautiful, but black dog breeds are often left behind in shelters. These pretty pooches will melt ...
A drawing by Konrad Lorenz showing facial expressions of a dog - a communication behavior. X-axis is aggression, y-axis is fear. Dog behavior is the internally coordinated responses of individuals or groups of domestic dogs to internal and external stimuli. [1] It has been shaped by millennia of contact with humans and their lifestyles.
The Keeshond (/ ˈ k eɪ s h ɒ n d / KAYSS-hond, plur. Keeshonden) is a medium-sized dog with a plush, two-layer coat of silver and black fur with a ruff and a curled tail. Their closest relatives are the German spitzes such as the Großspitz (Large Spitz), Mittelspitz (Medium Spitz), Kleinspitz (Miniature Spitz), Zwergspitz (Dwarf-Spitz) or Pomeranian.