I've been an animal lover all of my life and have always had dogs as pets. Some small breeds can be aggressive, such as Chihuahuas and some terriers. The difference is that you never hear about these dogs ripping a childs face off and killing it...because they don't. Pitbulls, Rotts, Chows, Shephards and Pincers have been bred to maim and kill humans, some for centuries. While these breeds can display benign, calm and even tempered behavior, they have the innate instinct to kill at times. They can do this sometimes without provocation. There is an inbred voracity in these breeds that can be totally unpredictable. All it takes is one incident and one snap of their powerful jaws to rip the face right off of a childs skull, maiming the child forever or maybe a kill. There are simply too many reports of adult, child and animal maulings by these breeds that results in disfigurement and death.