When behavior modification plans alone are insufficient, veterinary behaviorists prescribe medication. Pharmaceuticals are used to alter neurotransmitters in the brain, reducing panic and anxiety so the animal can cross the threshold into a state where learning can occur.

A normally gentle dog that suddenly snaps when touched on its lower back may be suffering from osteoarthritis, a herniated disc, or hip dysplasia. Pain lowers an animal's tolerance threshold, triggering defensive aggression to prevent further discomfort. 2. Elimination Disorders

Modern veterinary behaviorists utilize standard learning theories to modify animal actions safely and humanely.