The bull terrier in 1915 appears to have been a fit dog with a well-proportioned head and slim torso. "Dogs of All Nations" called ... pugs are among the oldest breeds of dogs, and they have ...
Still, they're all part of the same species. The Science of Dogs blog put together a side-by-side comparison of several popular breeds from the 1915 book "Dogs of All Nations" by Walter Esplin ...