4. Doberman Pinschers

As you can often see, Doberman Pinschers operate alongside the police because of intelligence and can be enthusiastic, energetic, and very loyal to the owner.
But for strangers, these things may not be true. Because it often harms and is not very sociable with others. This breed requires good care and coaching.
Plus the trainer needs to go to the gym to release a lot of energy, relieve stress, and reduce irritability, otherwise, even the owner himself could be injured/harmed as well.