Your average dog can run up to 19 mph.
But greyhound race dogs can reach speeds up to 43 mph.
The greyhound is a gentle and intelligent breed whose combination of long, powerful legs, deep chest, flexible spine, and slim build allows it to reach average race speeds in excess of 18 metres per second (59 feet per second, or 63 kilometres per hour (39 mph)).
The greyhound can reach a full speed of 70 kilometres per hour (43 mph) within 30 metres or six strides from the boxes, traveling at almost 20 metres per second for the first 250 metres of a race. The only other mammal that can accelerate faster over a short distance is the cheetah, which can reach speeds of 109 kilometres per hour (68 mph) over 3-4 strides from a standing start.
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