American Bulldog, huge dogs! They are supposed to weigh in at around 115-150 pounds! Tall dogs, mixtures of mastiffs, bulldogs, and different large breed dogs. These dogs are bred to be massive. The scott's type american bulldog is smaller but that is because they are bred not primarily with mastiff/bulldog but instead terrier/bulldog typically using APBT or Amstaffs with the classic bulldog. They are shorter and not nearly as massive.