"Unprovoked aggression" means displaying hostility or violence towards someone or something without any apparent reason or provocation. Full definition
Partial seizures, which occur in the region of the brain that controls aggression (hypothalamus or limbic system), can result in sudden unprovoked aggression in your pet. (bestattorney.com)
But if the pup shows unprovoked aggression, panics and can't overcome this, or exhibits strong avoidance, that's a pup that may need more rehabilitation work or socialization than most owners are able to provide. (thesprucepets.com)
Others have restrictions that, while well - meaning, have the unintended effect of screening out the very breeds of dogs that have successfully served as service animals for decades without a history of the type of unprovoked aggression or attacks that would pose a direct threat, e.g., German Shepherds. (animallawcoalition.com)