The Bullenbeisser (also known as the German Bulldog) was a breed of dog known for its strength and agility. The breed was closely related to the Bärenbeisser (some believe that the two breeds were the same; the names mean “bull-biter” and “bear-biter,” respectively), and the Boxer. It was in all its aspects similar to the present Alano Español and very alike to the Dogo Argentino, not only in aspect, but also in usage.
The Bullenbeisser became extinct by crossbreeding rather than by a decadence of the breed. In the late 1870s, German breeders Roberth, Konig, and Hopner used the dog to create a new breed, today called the Boxer.