The American Veterinary Medical Association through its Task Force on Canine Aggression and Canine-Human Interactions reports, "There are several reasons why it is not possible to calculate a bite rate for a breed or to compare rates between breeds. First, the breed of the biting dog may not be accurately recorded, and mixed-breed dogs are commonly described as if they were purebreds. Second, the actual number of bites that occur in a community is not known, especially if they did not result in serious injury. Third, the number of dogs of a particular breed or combination of breeds in a community is not known, because it is rare for all dogs in a community to be licensed, and existing licensing data is then incomplete."[30] Moreover, studies rely on 'reported' bites, leading the National Geographic Channel television show The Dog Whisperer to conclude that small dog breeds are likely responsible for more bites than large dog breeds, but often go unreported.[31]
In addition, according to the National Geographic Channel television show, Dangerous Encounters, the bite of a German Shepherd Dog has a force of over 238 pounds (compared with that of a Rottweiler, over 265-328 pounds of force, a Pitbull, 235 pounds of force, a Labrador Retriever, of approximately 230 pounds of force, or a human, of approximately 86 pounds of force).[32] Regardless, one source indicates that fatalities have been attributed to over 30 breeds since 1975, including small breeds, such as the Pomeranian.[33] Later test revealed that military trained German shepherds have a bite force ranging from 400-700lbs.