Reference: Yale University
More dog facts.
Prairie dogs, those little pups popping in and out of holes on vacant lots and rural rangeland, are talking up a storm. They have different "words" for tall human in yellow shirt, short human in green shirt, coyote, deer, red-tailed hawk and many other creatures.
The Bulldog was originally bred in England for bull-baiting, a brutal blood sport. After England banned it with the Cruelty to Animals Act of 1835, breeders reshaped the Bulldog into the gentle companion it is today.
The bloodhound is the only animal whose evidence is admissible in an American court.