@dogfacts

One unspayed female dog, her mate and their puppies can produce 67,000 puppies in six years.

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Puppies sleep 90% of the day for their first few weeks.

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The smallest known adult dog was a Yorkshire Terrier that was only 2.5 inches at the shoulder, and weighed only 4 ounces.

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A Russian dog named Laika was the first animal in space, traveling around Earth in 1957.

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Spiked dog collars were invented in ancient Greece and were originally designed to protect dogs throats from wolf attacks.

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A dog's nose print is unique, just like a human's fingerprint.

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Dogs have no sense of time.

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The most dogs ever owned by one person were 5,000 Mastiffs owned by Kublai Khan.

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Paul McCartney of the Beatles recorded a high pitched whistle at the end of "A Day in the Life" for his dog.

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One survey reports that 33% of dog owners admit they talk to their dogs on the phone or leave messages on answering machines while they are away..

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A dog most likely interprets a smiling person as baring their teeth, which is an act of aggression.

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In Australia, a man who was arrested for drug possession argued his civil rights were violated when the drug-sniffing dog nuzzled his crotch. While the judge dismissed the charges, they were later reinstated when a prosecutor pointed out that in the animal kingdom, crotch nuzzling was a friendly gesture.

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This dog, Naki'o, lost all of his legs to frostbite in Colorado, but now has four prosthetic legs and can run around like normal.

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Dogs can see best at dawn and dusk.

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It is not possible to know how many puppies a dog will have just by looking. The appearance can be very deceptive.

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