All these negative tools may
suppress barking or
growling but they do not work to change the
dog's emotional state as his opinion about the trigger.
(example: if aggression is being
suppressed by anxiety, the addition of meds could unmask it when the anxiety is relieved — with lowered inhibitions, a
dog who initially cowered in fear might now
growl or snap) The possibility for any side effect exists, however this one is rather rare.