The Cheetah has long been recognized as the fastest land animal in the world reaching speeds upwards of 70mph. Pronghorn antelopes, another animal on the savanna, can reach speeds of up to 60 mph. This animal can sustain these speeds much longer than a cheetah.
To determine the fastest animal in the world one has to consider the nature of the race that you are going to ask them run. Once we get speed on land, however, the most important consideration is going to be the distance over which the race is run.
The Labrador Retriever is the most popular purebred dog in America, according to 2008 registration statistics by the American Kennel Club (AKC).
Labrador Retriever Holds Firm in Top Spot and Lovable Bulldog Continues its Ascent. More than twice as many Labs were registered last year than any other breed making it a likely leader for many years to come, the Bulldog continues to amble its way up the list.
Other favorites include the Yorkshire Terrier, German Shepherd, Golden Retriever, Beagle, Boxer, Dachshund, Bulldog, Poodle and Shih Tzu, according to the report.
Source : www.thepetscentral.com