Canine aggression requires thorough assessment before any management decision. Understanding the types, triggers, and underlying causes of aggression guides welfare-positive treatment and realistic prognosis.
Dogs who display aggression are often experiencing significant welfare deficits themselves — fear, pain, or conflict that they communicate through aggressive behavior. A dog who bites is communicating that prior signals (growling, showing teeth, body language) were insufficient or were ignored. The welfare of an aggressive dog is often poor: chronic fear or pain creates a state of hyperarousal and stress that is profoundly uncomfortable. Treatment that addresses the underlying emotional state — through behavior modification that reduces fear, pain management that removes the trigger, or environmental management that reduces conflict — improves the dog's welfare while also reducing human risk. Euthanasia for aggression, while sometimes appropriate, should follow exhaustive exploration of alternatives when the dog's welfare can be managed safely.