Worlds Largest Dog
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! I use the past tense here because I don't have recent data on Zorba. Lets hope he is doing well.

Worlds Tallest Dog
The tallest dog on record was named Shamgret Danzas. He was 42 inches tall (at the shoulder!) and weighed 238 lbs.

Worlds Smallest Dog
The smallest dog in history was a tiny Yorkie from Blackburn, England. At two years of age and fully grown 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.

Worlds Oldest Dog
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!

Worlds Best Drug Sniffing Dogs
A US Customs Labrador named "Snag" has made 118 drug seizures worth a canine record $810 million.
The greatest number of drug seizures by dogs is 969 in 1988. IN ONE YEAR! The team of "Rocky" and "Barco" patrolled the Texas and Mexico border, alias "Cocaine Alley." They were so good that Mexican drug lords put a price of $30,000 dollars on their heads.

The Greatest Number Of Dogs
The greatest number of dogs ever owned by one person were 5000 mastiffs owned by Kubla Khan.

• A dog was once the King of Norway for 3 years during the 11th centurey AD. The Norwegian King, angry his subjects once deposed him put Saur on the throne, demanding that he be treated regally.
  
• The first dog show was held in England in 1859.
  
• The only dog in the world that cannot bark is the Basenji, an African wolf dog.
  
• Dogs and humans are the only animals with prostates.
  
• Dogs have about 100 different facial expressions, most of them made with the ears.
  
• Most domestic dogs are capable of reaching speeds of 32 kms per hour when running flat out but the members of the greyhound family may reach speeds up to 70 kms per hour.
  
• One of the worlds oldest breeds of dog is the Saluki. It is thought to have been developed in ancient Mesopotamia around 3000 B.C.
  
• The membranes in a dog's nose, if unfolded and laid out, would be larger than the dog itself.
  
• A female dog, her mate and her puppies can produce 12,288 dogs in five years.
  
• The Canary Islands were not named for a bird called a canary. They were named after a breed of large dogs. The Latin name was Canariae insulae - "Island of Dogs."
  
• There are more than 100 million dogs and cats in the United States. Americans spend more than 5.4 billion dollars on their pets each year.
  
• Dachshunds are the smallest breed of dog used for hunting. They are low to the ground, which allows them to enter and maneuver through tunnels easily.
  
• The theobromine in chocolate that stimulates the cardiac and nervous systems is too much for dogs, especially smaller pups. A chocolate bar is poisonous to dogs and can even be lethal.