yeah, something happened over the last 30-40 yrs, when I was young you seldom heard of attacks like this and people had them back then. I remember my friend's dad raised them, Walter and I were doing some stuff on my Camaro when we saw his dad come out of the house with a shotgun and walked over to sam his male pit and blow his head off, Walter asked him why and he said sam had growled at him earlier.
People used to have enough sense to kill a dog when it showed the first sign....which can help stop more serious problems before they happen with that dog or it's offspring or it's offspring's offspring.
