Scott-type Americans are consistently the most dangerous dogs I’ve been around. I haven’t yet known a family-safe one. Of course, I know there are some out there in the world. Just none I’ve known. They’re true bulldogs. Probably the best representations of what bulldogs were historically. Accounts prior to the 1800s describe the original English bulldogs as being uncontrollably vicious. That’s why they were crossed to pugs after bull baiting became illegal. With no purpose of bull baiting, there was no reason to keep the original bulldogs alive. They were too dangerous.
The Scott-type Americans are original southern white bulldogs crossed to pit bull terriers, which generally recreates the English bulldogs of the 1600s. They’re true working dogs. They have a purpose, but family pet isn’t really what they’re made for.
The other main line of American bulldog is the Johnson type, which can generally be thought of as southern whites crossed to modern English bulldogs. I have never owned a Johnson type.
I have owned one true southern white bulldog. My wife also grew up with one. The southern white, also called the “white English,” was the original bulldogs of the Southern colonies. It is unknown whether they’re actually the English bulldogs of the bullbaiting era, Spanish mastiffs, or something else entirely. I have a friend that is a canine historian and he believes the white English were a separate line of herding bulldogs known in English history that were never used for bullbaiting.
Here’s my wife as a child with her white English, and then her with my white English 20 years later. White English don’t have much of a catch drive at all.
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