Each inspiring episode of Dog: Impossible follows Beisner and his pioneering, progressive approach to changing canine behaviour. He focuses on the unique needs of each animal, from detachment issues to aggression driven by fear. Beisner's unique approach is rooted in developing the deepest possible relationship between a dog and its owner, which is grounded in respect, trust and love. Even after all he has witnessed, Beisner still believes there is no such thing as a bad dog. Written by Nat Geo WILD