Yeah I have also had an experience like this, I was hauling wood for a winter job to a couple that lived about 10 miles out of town here, my blue heeler always rides on top of the wood I haul. Well when I showed up the guy says I have a pit bull so I told him to put it away while I was there cause I had my dog with me. Well about 2 minutes after I started unloading the wood I hear my dog growling from under my truck.... (He never growls), so it got my attention. I look over about the time the pitbull came running off the porch for him and grabs my dog by the throat, I came uncorked, I reached onto my back seat grabbed my little ruger .22, and made the pitbull a veggie, owners werent too happy about it, I said it was either thiers or mine, but i had the gun in my hands..... I did end up givin em the wood for killin thier dog though....