Though this breed was once a fierce gladiator, he is much gentler now. A Bull Terrier might have a preventive effect and it might defend its owner in a truly critical situation, but it isn’t bred to be a guard dog. Courageous, scrappy, fun-loving, active, clownish and fearless, the Bull Terrier is a loyal, polite, and obedient dog. They become very attached to their owners. The Bull Terrier thrives on firm, consistent leadership and affection and makes a fine family pet. Bull Terriers like to be doing something and fit in well with active families where they receive a great deal of companionship and supervision. They do not do well in situations where they are left alone for 8 hours a day. With the right type of owner this breed is a joy to own, but not recommended for most households. Fond of both grownups and children, but if they do not get enough physical and mental exercise they may be too energetic for small children. Children should be taught how to display leadership toward the dog. Meek owners will find them to become very protective, willful, possessive and/or jealous. Bull Terriers may try to join into family roughhousing or quarrel. They need very firm training and lots of exercise. Bull Terriers must be given a lot of structure, or they may become destructive. Be sure to socialize them well and remain their pack leader 100% of the time, otherwise, they can be extremely aggressive with other dogs. Unaltered males may not get along with other male dogs. They are not recommended with other non-canine pets such as rabbits, hamsters and guinea pigs. They make excellent watch dogs. This breed can be somewhat difficult to train.