– Dogs (and wolves and foxes) are descended from a small, weasel-like  mammal called Miacis which was a tree-dwelling creature and existed about  40 million years ago. The first dog to come down from the trees was the  Dawn dog.
The Dawn dog still exists in Australia.

    – Dogs, as we know them today, first appeared in Eurasia about 13,000  years ago, and were probably a direct descendant of a small, grey wolf  (not from the type of jackal or jackal/wolf as previously thought).

    – The dingo is not native to Australia but was introduced thousands of  years ago by the first immigrants.

    – Dogs were first domesticated by cavemen in the Paleolithic age and  gradually developed (or were bred) into the breeds known today.

    – The tallest dogs are the Great Dane and the Irish Wolfhound. The  largest Great Dane stood at 103cm and an Irish Wolfhound 100cm. The  heaviest dog was a St. Bernard weighing 63.5kg.

    – The smallest dogs are the Chihuahua, the Yorkshire Terrier and the  Toy Poodle. A Yorkie once weighed in at only 283.5g.

    – Dogs have been used as guards, hunters, draught animals, eyes for  the blind, drug and explosive detectors, cancer detectors, rodent  controllers- and even weapons. In Roman times and the Middle Ages,  mastiffs wearing light armour, carrying spikes and pots of flaming  sulphur and resin ran into battle against mounted knights. In World War  II the Russians trained dogs to run suicide missions between the tracks  of German tanks with mines strapped on their backs.

    – Dogs’ hearing is very acute. They can register sounds of 35,000  vibrations a second (compared to our 20,000 and a cat’s 25,000).

    – Dogs naturally have a wonderful sense of smell. They have many more  sensory ‘smelling’ cells than a man’s 5,000,000. A Dachshund has  125,000,000, a Fox Terrier 147,000,000 and an  German Shepherd (often  used as a ‘sniffer’ dog) has 220,000,000. Truffle hounds can find the  fungus delicacy even when it’s a foot underground.

    – The oldest reliable age recorded for a dog is 29 years, 5 months for  a Queensland ‘heeler’ called Bluey in Victoria, Australia. The average  dog lives to around 15 years of age.

    – The common belief that dogs are colour blind is false. Dogs can see  colour but it is not as vivid a color scheme as we see. It is much like  our vision at twilight.

    – Dogs dream. If you look at your dog while it’s sleeping, sometimes  you’ll see its eyes move and twitch under its eyelids. Humans do this  too, and we definitely dream. So researchers are almost positive that  dogs have dreams too. Of course, no one knows what dogs dream about.

    – The bloodhound is the only animal whose evidence is admissible in an  American court.

    – The pom-pom cut was originally developed to increase the poodle’s  swimming abilities as a retriever. The haircut allowed for faster  swimming but the pom-poms were left to keep the joints warm.

    – Big dogs have larger litters than smaller dogs, but smaller dogs  generally live much longer than larger dogs.

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