The two top contenders for this distinction are: greyhounds and whippets.
The Grayhound.
The Greyhound
grey hound
The Whippet is the fastest dog. It can can run about 40 miles per hour.
The fastest dog in the whole world is the afghan hound. This dog was scientifically proven as the fastest dog on the earth. It can run up to 45 miles per hour. It's also very well trained.
About 46mph Ran by a Greyhound
An Alsatian/German Shepherd, fast movement, intelligent, and loyal dogs. They're so powerful and about the 3rd most deadly dog. Best guard dog by a mile
The fastest breed of dog is probably the greyhound but poodles love to run and are very fast.
The greyhound is one of the fastest, but I think the Saluki could be a close competitor as well.
grey hound
grey hound
The fastest known breed of dog.
probably the dog.
Well it just depends on what type of breed it is. Like the Thoroughbred, its the fastest breed, can run to 40miles and hour.
The Whippet is the fastest dog. It can can run about 40 miles per hour.
Most likely the Italian Greyhound.
2 mph
How fast a dog can run would depend on the breed of the dog.
The Greyhound is the fastest dog and can run at speeds of 45mph!!