There are many different dog breeds and they all have different temperaments, which is part of the reason why many dog ​​lovers are sometimes more specific to one breed than to others. Although not all seemingly unique behaviors of a breed are breed specific, the most prominent one is aggression. By definition, aggression can refer to a wide range of behaviors that occur for a large number of reasons in many different circumstances. Almost all wild animals are aggressive when guarding their territory, protecting their offspring and themselves. Saying a dog is “aggressive” can also mean many different things. Aggression includes a range of behaviors that have specific warning signs and can escalate into an attack. A dog that exhibits such signs to people usually exhibits warnings to stay away, such as becoming very still and rigid, a guttural bark that sounds threatening, lunging forward or charging at the person without contact, mouthing, such as to move or control the person, without applying significant pressure, growling, baring teeth, or a quick pinch that leaves no mark. The most serious actions are bites ranging from no marks on the skin to bruising and puncture wounds, repeated biting and shaking. Unfortunately, aggression is one of the most notable cases in which a dog owner decides to abandon a pet. Sometimes, if a dog is considered to be behaviorally defective and cannot be rehabilitated, euthanasia is the final drastic step. Aggression directed at owners is not a single event and causes an emotional struggle between the owner and the animal. Assessment and treatment of this troublesome behavior problem must take into account the safety of the owner as well as practical expectations for improvement. Relatively mild aggression can be...... middle of paper ......t: A risk factor for non-playful biting? TVJ 2008; 177:205-215.11. Gaschot I. Review of research article on dog training methods. TCTB 2014.12. Anon. Preventing Canine Behavior Problems: Cummings School of Veterinary Medicine. To be confirmed 2014.13. Williams N, Borchelt P. Aggressive behavior: three case studies. FICP 2003; 16(4) 226-23614. Neilson J, Eckstein R, Hart B. Effects of neutering on problem behaviors in male dogs as a function of age and duration of behavior. J Am Vet Med Assoc 1997; 211:180-182.15. Dodman N, Donnelly R, Shuster L, Mertens P, Rand W, Miczek K. Use of fluoxetine to treat dominance aggression in dogs. J Am Vet Med Assoc 1996; 209:1585-1587.16. Dodman N, Miczek K, Knowles K, Thalhammer J, Shuster L. Episodic dyscontrol (rabies) responsive to phenobarbital in dogs. J Am Vet Med Assoc 1992; 201:1580-1583.17. Miller P syndrome. Rabies in dogs. WDJ 2004.