I see another dog's nose at the bottom of that picture where it's zoomed out more. Obviously that dog is lunging/snarling at the other dog. Now, pits HAVE been bred to be dog-aggressive, and I DO think they have more of a chance to be aggressive towards other DOGS if they are not properly socialized as pups. However, the casual uneducated person just looking at that photo is only going to see one thing: The vicious pit bull.