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. The dog was the first species to be domesticated by humans, over 14,000 years ago and before the development of agriculture. Experts estimate that due to their long association with humans, dogs have gained the ability to thrive on a starch-rich diet that would be inadequate for other canids.
Dogs have been bred for desired behaviors, sensory capabilities, and physical attributes. Dog breeds vary widely in shape, size, and color. They have the same number of bones (with the exception of the tail), powerful jaws that house around 42 teeth, and well-developed senses of smell, hearing, and sight. Compared to humans, dogs have an inferior visual acuity, a superior sense of smell, and a relatively large olfactory cortex. They perform many roles for humans, such as hunting, herding, pulling loads, protection, companionship, therapy, aiding disabled people, and assisting police and the military.
Communication in dogs includes eye gaze, facial expression, vocalization, body posture (including movements of bodies and limbs), and gustatory communication (scents, pheromones, and taste). They mark their territories by urinating on them, which is more likely when entering a new environment. Over the millennia, dogs became uniquely adapted to human behavior; this adaptation includes being able to understand and communicate with humans. As such, the human–canine bond has been a topic of frequent study, and dogs' influence on human society has given them the sobriquet of "man's best friend". (Full article...)
They have a dense coarse coat that protects them from the weather and from vermin. Giant Schnauzers come in three color varieties: pepper and salt, pure black with black undercoat, and black and silver. Where legal, they are shown with cropped ears and docked tails. Like other schnauzers, they have a distinct beard and eyebrows. Today, the Giant Schnauzer participates in numerous dog sports, including Schutzhund. Another sport that the dog excels in is that of nosework. Due to its alert nature, the dog is also used in police work. (Full article...)
A Border Collie correctly maneouvring through weave poles in dog agility. Border Collies are an extremely intelligent breed with an instinctive desire to work. They are also extremely energetic and require a lot of attention, but are very responsive to training. They are better off in a household that can provide them with plenty of exercise and a job to do.
Canine influenza (dog flu) is influenza occurring in canine animals. Canine influenza is caused by varieties of influenzavirus A, such as equine influenza virus H3N8, which was discovered to cause disease in canines in 2004. Because of the lack of previous exposure to this virus, dogs have no natural immunity to it. Therefore, the disease is rapidly transmitted between individual dogs. Canine influenza may be endemic in some regional dog populations of the United States. It is a disease with a high morbidity (incidence of symptoms) but a low incidence of death.
A newer form was identified in Asia during the 2000s and has since caused outbreaks in the US as well. It is a mutation of H3N2 that adapted from its avian influenza origins. Vaccines have been developed for both strains. (Full article...)
Image 10A drawing by Konrad Lorenz showing facial expressions of a dog - a communication behavior. X-axis is aggression, y-axis is fear. (from Dog behavior)
Image 34The difference in body size between a Cane Corso (Italian mastiff) and a Yorkshire Terrier is over 30-fold; both are members of the same species. (from Dog anatomy)
Image 48Schematic anatomy of the ear. In dogs, the ear canal has a "L" shape, with the vertical canal (first half) and the horizontal canal (deeper half, ending with the eardrum) (from Dog anatomy)
... that Pulaski's Masterpiece, billed as the "world's most valuable dog", disappeared without a trace in 1953?
... that Chuck Eisenmann went from professionally pitching in baseball to owning and training the dogs that starred on the Canadian television series The Littlest Hobo?
...that the stray dogs Bummer and Lazarus(pictured) were so popular with the people of San Francisco in the 1860s that they were given special exemption from the leash laws?
...that Manuel Benito de Castro assumed the Presidency of Cundinamarca, with the condition that he would be allowed to leave Congress at a certain time to feed his dog?
...that the namesake for Hondo Dog Park in Hillsboro, Oregon, won an award for valor just weeks before being killed in the line of duty?
...that most of the dogs seen in the 2007 Thai film, Ma-Mha, were strays rescued from shelters and trained specifically for the film?
...that Lap dogs are among the oldest types of dogs?
...that the Kangal Dog has been declared a "National Cultural and Historic Treasure" by the Turkish government?
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