This is why they made the Stevens ''bicycle pistol'' back when the front wheel of the bicycle was as tall as we were.Seriously,this has been a problem as long as there were bicycles,and still is ,especially in rural areas.People out here in the sticks tend to keep large agressive dogs and they let them roam the property while they're at work.Unfortunatly,the dog sometimes takes as it's property as ''as far as I can see'',and often will jump a fence,and make a friend with a neighbor dog,and they soon make a pack.As a pack,anything they see moveing can be inturpeted as ''flight'' sending the persue message to their furry little minds,and the next thing you know,you're being chased by a pit bull,a rottweiler and a doberman.