Consequently, it’s unfair to callously label a dog as dangerous. Nevertheless, it can’t be helped that some dog breeds have more potential to cause serious harm to a person if the dog were to decide to attack. Therefore, our 25 most dangerous dog breeds focuses on the potential of a dog to cause serious injury to a victim. It is important to note however that most dogs are bred with the desire to please their masters. Thus most incidents involving dogs stem from improper training and harsh ownership.