I own two dogs both of which are mixed with "certain breeds". Now I rescued both these animals and never sought out either for a specific breed. I believe that it is in fact my responsibility to make sure my dogs are leashed or otherwise contained. One of mine would almost certainly chase and catch most cyclists if he got out. He's not a mean dog he just has a chase instinct when it comes to bikes. So I m not about to preach against owner responsibility, but I think breed specific legislation and insurance policies are awful, illegal, Andy based on no fact. The fact is that dog bite numbers tend to correlate with breed popularity. In other words a lab is just as likely to bite or not as a pit.