http://www.cdc.gov/ncipc/duip/dog3.pdf
ιδιαίτερη σημασία στην αρχή όπου αναφέρει ότι τα αποτελέσματα μπορεί να είναι ελλατωματικά (? δεν θυμάμαι πως να το μεταφράσω σωστά) διότι δεν έχει μετρηθεί η επιλογή συγκεκριμένης φυλής από συγκεκριμένη κοινωνική ομάδα.
http://www.animallaw.info/articles/arus74fordhamlrev2847.htm
"
1. Statistical Evidence
Because statistics indicate that all breeds bite, critics of breed-based ordinances argue that legislation which targets one or even a few breeds may not reduce the number of dog bites or serious attacks. [FN186] Breed is not indicative of human aggression; rather, it is only one factor to be considered in an evaluation of a dog's biting tendency. [FN187] Several medical studies do not include breed as a relevant factor in biting propensity, instead listing heredity, sex, early experience, socialization and training, health, reproductive status, quality of ownership and supervision, and victim behavior. [FN188] Despite legislation singling out pit bulls as human aggressive, a study cited by the Prince George's County, Maryland, Vicious Animal Legislation Task Force found that between 1988 and 1993, pit bulls typically ranked no higher than fifth among breeds most responsible for severe bites. [FN189]"
Συμπερασματικά: Η φυλή παίζει μικρό ρόλο στην επιθετικότητα, είτε αυτή εκφράζεται σε ανθρώπους ή άλλα σκυλιά.