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The worlds heaviest as well as longest dog ever recorded was an Old English Mastiff named Zorba. In 1989, Zorba weighed 343 lbs and was 8 feet 3 inches long from nose to tail!
The tallest dog on record was named Shamgret Danzas. He was 42 inches tall (at the shoulder!) and weighed 238 lbs.

The smallest dog in history was a tiny Yorkie from Blackburn, England. At two years of age and fullygrown this little dude was an incredible 2.5 inches tall by 3.75 inches long! He weighed only 4 ounces! HE was approximately the size of a matchbox.

The oldest dog that has been reliably documented was an Australian cattle-dog named Bluey. He was put to sleep at the age of 29 years and 5 months!

Russian scientists sent the small animal aloft in an artificial earth satellite in 1957