Not all dogs are man’s best friends. Some of them are extremely dangerous. They are difficult to control since they will be trying to dominate you.
If you are not ready to dedicate your time and money to take special courses, do not keep any of the breeds listed below.
A few years ago the doberman’s reputation was one of the worst. It has slightly improved, yet this breed is still considered rather dangerous. This dog is strong. It is huge as well and can easily kill a human.