kill spiders in house Some writers contend it was the White English Terrier, Fox Terrier, or the Black and Tan Terrier that was crossed with the Bulldog to develop the Staffordshire Terrier; all three breeds shared many traits, the greatest differences being in color, and spirit. Centuries of selective breeding by humans has resulted in dogs being more genetically diverse than most other mammals by a considerable margin. The American Cocker was the most popular breed in the United States during the 1940s and 1950s and again during the 1980s, reigning for a total of 18 years. It is a happy breed with average working intelligence, although by being bred to a show standard it is no longer an ideal working dog. In coated to coated matings, all puppies will be coated.
The American Staffordshire Terrier should give the impression of great strength for his size, a well put-together dog, muscular, but agile and graceful, keenly alive to his surroundings. As such, dogs are the only animal with such a wide variation in appearance without speciation, "from the Chihuahua to the Great Dane". The following list uses a wide interpretation of "breed". There does not seem to be any gender preference among dogs as pets, as the statistical data reveal an equal number of female and male dog pets. Centuries of selective breeding by humans has resulted in dogs being more genetically diverse than most other mammals by a considerable margin. The more exposure to good training practices, other dogs, and people, the more likely the success at being controlled both inside and outside of their environment.