An American Bulldog is typically a happy, friendly, and assertive dog that is at ease with its family and fine with strangers as they get to know the stranger in question. They are quite fond of children but sometimes do not know their own strength. Thus, as with all dogs, they should be supervised with small children. They bond strongly with their master and family but, because of strong guarding instincts and a somewhat dominant attitude, they need a firm but fair hand; they should be socialized and obedience trained early to expose them to other dogs and people and to ensure that they can be controlled around company as they get older and larger, they can be stubborn and mischievous if not exercised enough.They are working dogs with high energy drives. They need room to expend their energy, and so American Bulldogs do best in a home with a backyard and preferably a "job" to do. A tired well worked bulldog is a happy bulldog. They are not always well behaved towards cats and smaller pets, but correct socialization at an early age can greatly increase the chances of them accepting these animals. This behavior is a reflection of a breed trait called prey drive. High prey drive is a desirable trait in an American Bulldog. A well bred American Bulldog is a catch dog of large herbivores. They can be stubborn with training though once they are trained they tend to obey their masters faithfully. American bulldog puppies can be relatively difficult to housebreak, thus it is important to be persistent.