Dogs may be man’s best friend, but some of them are also lightning-fast athletes. The fastest dog breeds in the world were originally bred for hunting, racing, or guarding, and they boast lean bodies, muscular builds, and remarkable speed.

While not all dogs are born to run, these breeds can cover ground quickly and maintain high speeds when needed.

1. Greyhound (45 mph)

The Greyhound is the fastest breed in the dog world, capable of reaching top speeds of 45 mph (72 km/h).

Originally bred as racing dogs and hunting dogs, Greyhounds have aerodynamic bodies, deep chests, and an athletic build that allows them to accelerate faster than almost any other breed. They remain the iconic choice for dog runs and racing events.

2. Saluki (42 mph)

The Saluki, originally bred in the Middle Eas

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