An interesting look at the relationship between dog behavior and Pedigree. Dr. James A Serpell, PhD is an expert on canine behavior and the data that he has collected from over 80,000 detailed surveys of dog owners shows that there are some misconceptions when it comes to pure breed dogs and behavior, particularly in regards to levels of aggression. Whether you get a dog from Animal Control or the Human Society or whether you buy a pure breed dog remember that you play a huge role how your dog is going to behave.