Breed Differences in Canine Aggression

"The present study surveyed the owners of more than 30 breeds of dogs using the Canine Behavioral Assessment and Research Questionnaire (CBARQ), a validated and reliable instrument for assessing dogs’ typical and recent responses to a variety of common stimuli and situations. Two independent data samples (a random sample of breed club members and an online sample) yielded significant differences among breeds in aggression directed toward strangers,owners and dogs (Kruskal–Wallis tests, P < 0.0001)."