We understand why dogs chase cats, but why would a domesticated dog stalk or kill a small dog or child or tear the stuffing out of a squeaky toy?  In short, what is predatory drift and why does it occur?  Looking at the transition from wild canid to family dog, Jean examines the function and dysfunction of genetically based behaviour
(preparedness) in the life of today's domestic dog.

Jean discusses fixed action patterns, or behaviours which are hard wired and the effect called 'misbehavbiour of organisms' - when behaviours or fixed action patterns fire at inappropriate times.  She explores how these phenomenon can interfere with even expert training attempts to address aggression using operant and classical conditioning.  From her conclusions Jean presents a fresh view of the nature versus nurture debate and solid advice for today's dog trainer working with aggression.