We tend to anthropomorphise and attribute human emotions to our dogs. A good example of this is the so-called guilty look.

Dangerous: have been convicted three times for running loose or have caused a non-serious injury to a person or killed another dog. Vicious: have caused serious injury −permanent incapacity ...

Aggressive dogs fall into three categories and their behavior must be unprovoked and documented. Here's how it breaks down: Nuisance: have acted in menacing way toward someone, such as chasing, ...