One other thing about this topic is that, yes it is true that a dog's temperment is a direct result of how it's owners raise and treat it, but people need to keep in mind the basis for what they were originally bred for. Guard dogs are, by nature, going to have a predisposition to being more aggressive. That is what they were bred for, to be a menacing threat to anyone who would want to harm their master. Other breeds, like Working dogs, are not going to have this inherent quality of aggression, but that doesn't mean that they lack the ability to be so. After WWII, German Shepards became a very popular breed. Many people found out the hard way that they tend to BITE! This may be for a variety of reasons, but a fact is a fact. I love German Shepards, but I don't think I would ever get one because I have seen them bite a lot of people. There is a reason why they have been used by the military and police forces for a long, long time. These are the things that people need to realize when they buy dogs, each breed has it's pros and cons and potential risks.