#10 Dogs are wayward and try to create a hierarchy in the family, in which they are the leader.
For this reason, already when purchasing a Jack Russell Terrier puppy, you need to set clear boundaries for him and indicate his place in the family, otherwise, you can get an indomitable, completely uncontrollable dog.
#11 A distinctive feature of this breed is boundless courage. A small dog is ready to get involved in a fight with an opponent much larger than itself.
Representatives of this breed cannot stand loneliness - a pet left alone with itself can seriously ruin things and furniture, and if the animal is often left alone, aggression directed against a person appears in it.