The results of our 2004-2007 North American Dangerous Dogs Investigation suggest that dog bites are increasing, rather than decreasing or remaining static. During our 3-year investigation, we found that the vast majority of dog bites go unreported, likely because society as a whole does not yet realize that small bites often lead to big bites, (i.e., a dog that has learned that an act of aggression achieves its objective will resort to using its teeth to achieve success in the future, typically with an increase in the intensity of aggression exhibited as confidence is gained). In most cases, victims and witnesses did not report minor bites unless and until a more serious bite had occurred. Owners tended to excuse and justify even severe bites from their own dogs. One dog ripped his owner's ear off and the owner had his brother, a cosmetic surgeon, sew it back on. The bite was never reported, and the owner shrugged off the vicious attack as, "It's my fault -- he was tired of me hugging him." This is an extreme case of a pervasive tendency for owners to minimize or justify even severe acts of aggression. We confirmed that in the vast majority of Dog Bite-Related Fatalities, previous acts of aggression and even other bite incidents had preceded the attack. We found that the majority of dog bite victims who were friends or family of the dog's owner did not report the bite as such because they didn't want their dog, or their friend's dog, to "get in trouble". We found this to be the case, even if the bite was severe enough for the victims to seek treatment at a hospital. In these cases, bites were frequently reported as injuries from a variety of falls, (off bikes, down stairs, in the woods, etc). We found that veterinarians, vet-techs, groomers, boarding kennels, and trainers were experiencing an increase in dog bites which they rarely reported as such because they did not want to alienate clients. Finally, it was also our experience that people have less free time now and are thus socializing and training their dogs less, and that this is likely contributing to the observed increase in dog bites. But again, without a centralized repository of dog bite information, conclusive data on the number and type of bites occurring is simply not available. For more information of the findings from our three-year Dangerous Dogs Investigation, please see the websites: www.PreventDogBites.com, and www.PreventDogBites.ca.