Steps toward a comparative clinical psychopharmacology; neurochemical bases of aggression; pharmacologic treatment of aggression in veterinary patients; systemic causes of aggression and their treatment; fear and anxiety - mechanisms, models and molecules; pharmacologic treatment of situational fear and anxiety in animals; pharmacology of acquired fears and phobias; basic mechanisms of compulsive and self-injurious behaviour; stereotypic behaviour - the pharmacologic treatment of compulsive disorder; self-injurious behaviour (SIB) and its role in obsessive-compulsive disorder in domestic animals; progestins - indications for male-typical problem behaviours; pharmacological approaches to urine marking in cats; geriatric behaviour problems; canine cognitive dysfunction - understanding the syndrome and treatment with L-deprenyl; evaluation of clinical traits in behavioural pharmacology.