I beg to differ. Some dogs have extremely high prey drives, regardless if they kill anything or not. This behavior is not blood lust.. it’s ingrained behavior. The aggressive behaviors passed down from their wolf ancestors and their breeding is in no way impacted by tasting blood. The blood your dog tastes will not cause it to attack again. There is no scientific backing to this claim. The contributing factor is the temperament of the dog. If the dog attacks it’s more likely to attack again due to improper socialization skills not a blood thirst